diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8ca06e5d1..3ae88177e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -42,6 +42,7 @@
 - Minor: Tabs unhighlight when their content is read in other tabs. (#5649)
 - Minor: Made usernames in bits and sub messages clickable. (#5686)
 - Minor: Mentions of FrankerFaceZ and BetterTTV in settings are standardized as such. (#5698)
+- Minor: Added support for the "Device code grant flow" for authentication. (#5680)
 - Bugfix: Fixed tab move animation occasionally failing to start after closing a tab. (#5426, #5612)
 - Bugfix: If a network request errors with 200 OK, Qt's error code is now reported instead of the HTTP status. (#5378)
 - Bugfix: Fixed restricted users usernames not being clickable. (#5405)
diff --git a/src/Application.cpp b/src/Application.cpp
index 8cb221101..9b1ede765 100644
--- a/src/Application.cpp
+++ b/src/Application.cpp
@@ -236,7 +236,9 @@ void Application::initialize(Settings &settings, const Paths &paths)
 
     // XXX: Loading Twitch badges after Helix has been initialized, which only happens after
     // the AccountController initialize has been called
-    this->twitchBadges->loadTwitchBadges();
+    this->accounts->twitch.requestCurrent([this](const auto &) {
+        this->twitchBadges->loadTwitchBadges();
+    });
 
 #ifdef CHATTERINO_HAVE_PLUGINS
     this->plugins->initialize(settings);
@@ -271,7 +273,9 @@ void Application::initialize(Settings &settings, const Paths &paths)
     {
         this->initNm(paths);
     }
-    this->twitchPubSub->initialize();
+    this->accounts->twitch.requestCurrent([this](const auto &) {
+        this->twitchPubSub->initialize();
+    });
 
     this->initBttvLiveUpdates();
     this->initSeventvEventAPI();
diff --git a/src/common/ChatterinoSetting.hpp b/src/common/ChatterinoSetting.hpp
index 9db04def4..fcae2a036 100644
--- a/src/common/ChatterinoSetting.hpp
+++ b/src/common/ChatterinoSetting.hpp
@@ -111,7 +111,6 @@ public:
         _registerSetting(this->getData());
     }
 
-    template <typename T2>
     EnumStringSetting<Enum> &operator=(Enum newValue)
     {
         this->setValue(qmagicenum::enumNameString(newValue).toLower());
@@ -138,6 +137,21 @@ public:
             .value_or(this->defaultValue);
     }
 
+    static Enum get(const std::string &path, Enum defaultValue)
+    {
+        EnumStringSetting<Enum> setting(path, defaultValue);
+
+        return setting.getEnum();
+    }
+
+    static void set(const std::string &path, Enum newValue,
+                    Enum defaultValue = static_cast<Enum>(0))
+    {
+        EnumStringSetting<Enum> setting(path, defaultValue);
+
+        setting = newValue;
+    }
+
     Enum defaultValue;
 
     using pajlada::Settings::Setting<QString>::operator==;
diff --git a/src/messages/MessageBuilder.cpp b/src/messages/MessageBuilder.cpp
index 00b5eedbf..6f18b13cb 100644
--- a/src/messages/MessageBuilder.cpp
+++ b/src/messages/MessageBuilder.cpp
@@ -53,6 +53,7 @@
 #include <QDateTime>
 #include <QDebug>
 #include <QFileInfo>
+#include <QStringBuilder>
 #include <QTimeZone>
 
 #include <algorithm>
@@ -1987,6 +1988,29 @@ MessagePtr MessageBuilder::makeLowTrustUpdateMessage(
     return builder.release();
 }
 
+MessagePtrMut MessageBuilder::makeAccountExpiredMessage(
+    const QString &expirationText)
+{
+    auto loginPromptText = u"Try adding your account again."_s;
+
+    MessageBuilder builder;
+    auto text = expirationText % ' ' % loginPromptText;
+    builder->messageText = text;
+    builder->searchText = text;
+    builder->flags.set(MessageFlag::System,
+                       MessageFlag::DoNotTriggerNotification);
+
+    builder.emplace<TimestampElement>();
+    builder.emplace<TextElement>(expirationText, MessageElementFlag::Text,
+                                 MessageColor::System);
+    builder
+        .emplace<TextElement>(loginPromptText, MessageElementFlag::Text,
+                              MessageColor::Link)
+        ->setLink({Link::OpenAccountsPage, {}});
+
+    return builder.release();
+}
+
 std::pair<MessagePtrMut, HighlightAlert> MessageBuilder::makeIrcMessage(
     /* mutable */ Channel *channel, const Communi::IrcMessage *ircMessage,
     const MessageParseArgs &args, /* mutable */ QString content,
diff --git a/src/messages/MessageBuilder.hpp b/src/messages/MessageBuilder.hpp
index 122348b06..298cd9f8d 100644
--- a/src/messages/MessageBuilder.hpp
+++ b/src/messages/MessageBuilder.hpp
@@ -258,6 +258,9 @@ public:
                                             const QVariantMap &tags,
                                             const QTime &time);
 
+    static MessagePtrMut makeAccountExpiredMessage(
+        const QString &expirationText);
+
 private:
     struct TextState {
         TwitchChannel *twitchChannel = nullptr;
diff --git a/src/providers/irc/IrcConnection2.cpp b/src/providers/irc/IrcConnection2.cpp
index 3f9d57c97..ffc623298 100644
--- a/src/providers/irc/IrcConnection2.cpp
+++ b/src/providers/irc/IrcConnection2.cpp
@@ -53,7 +53,7 @@ IrcConnection::IrcConnection(QObject *parent)
         else
         {
             qCDebug(chatterinoIrc) << "Reconnecting";
-            this->open();
+            this->connectAndInitializeRequested();
         }
     });
 
diff --git a/src/providers/irc/IrcConnection2.hpp b/src/providers/irc/IrcConnection2.hpp
index 0e269397c..4440a9bf4 100644
--- a/src/providers/irc/IrcConnection2.hpp
+++ b/src/providers/irc/IrcConnection2.hpp
@@ -12,6 +12,8 @@ namespace chatterino {
 
 class IrcConnection : public Communi::IrcConnection
 {
+    Q_OBJECT
+
 public:
     IrcConnection(QObject *parent = nullptr);
     ~IrcConnection() override;
@@ -31,6 +33,11 @@ public:
     virtual void open();
     virtual void close();
 
+signals:
+    /// Emitted when this connection intends to be connected.
+    /// The server should initialize this connection an open it.
+    void connectAndInitializeRequested();
+
 private:
     QTimer pingTimer_;
     QTimer reconnectTimer_;
diff --git a/src/providers/twitch/IrcMessageHandler.cpp b/src/providers/twitch/IrcMessageHandler.cpp
index 9864b3644..91762df54 100644
--- a/src/providers/twitch/IrcMessageHandler.cpp
+++ b/src/providers/twitch/IrcMessageHandler.cpp
@@ -230,29 +230,10 @@ MessagePtr parseNoticeMessage(Communi::IrcNoticeMessage *message)
 
     if (message->content().startsWith("Login auth", Qt::CaseInsensitive))
     {
-        const auto linkColor = MessageColor(MessageColor::Link);
-        const auto accountsLink = Link(Link::OpenAccountsPage, QString());
         const auto curUser = getApp()->getAccounts()->twitch.getCurrent();
-        const auto expirationText = QString("Login expired for user \"%1\"!")
-                                        .arg(curUser->getUserName());
-        const auto loginPromptText = QString("Try adding your account again.");
 
-        MessageBuilder builder;
-        auto text = QString("%1 %2").arg(expirationText, loginPromptText);
-        builder.message().messageText = text;
-        builder.message().searchText = text;
-        builder.message().flags.set(MessageFlag::System);
-        builder.message().flags.set(MessageFlag::DoNotTriggerNotification);
-
-        builder.emplace<TimestampElement>();
-        builder.emplace<TextElement>(expirationText, MessageElementFlag::Text,
-                                     MessageColor::System);
-        builder
-            .emplace<TextElement>(loginPromptText, MessageElementFlag::Text,
-                                  linkColor)
-            ->setLink(accountsLink);
-
-        return builder.release();
+        return MessageBuilder::makeAccountExpiredMessage(
+            u"Login expired for user \"" % curUser->getUserName() % u"\"!");
     }
 
     if (message->content().startsWith("You are permanently banned "))
diff --git a/src/providers/twitch/TwitchAccount.cpp b/src/providers/twitch/TwitchAccount.cpp
index 3dbbe7a10..35e265cd9 100644
--- a/src/providers/twitch/TwitchAccount.cpp
+++ b/src/providers/twitch/TwitchAccount.cpp
@@ -30,14 +30,74 @@ namespace chatterino {
 
 using namespace literals;
 
-TwitchAccount::TwitchAccount(const QString &username, const QString &oauthToken,
-                             const QString &oauthClient, const QString &userID)
+std::optional<TwitchAccountData> TwitchAccountData::loadRaw(
+    const std::string &key)
+{
+    using QStringSetting = pajlada::Settings::Setting<QString>;
+
+    auto username = QStringSetting::get("/accounts/" + key + "/username");
+    auto userID = QStringSetting::get("/accounts/" + key + "/userID");
+    auto clientID = QStringSetting::get("/accounts/" + key + "/clientID");
+    auto oauthToken = QStringSetting::get("/accounts/" + key + "/oauthToken");
+
+    if (username.isEmpty() || userID.isEmpty() || clientID.isEmpty() ||
+        oauthToken.isEmpty())
+    {
+        return std::nullopt;
+    }
+
+    auto accountType = EnumStringSetting<TwitchAccount::Type>::get(
+        "/accounts/" + key + "/accountType",
+        TwitchAccount::Type::ImplicitGrant);
+    auto refreshToken =
+        QStringSetting::get("/accounts/" + key + "/refreshToken");
+    auto expiresAtStr = QStringSetting::get("/accounts/" + key + "/expiresAt");
+    QDateTime expiresAt;
+    if (accountType == TwitchAccount::Type::DeviceAuth)
+    {
+        expiresAt = QDateTime::fromString(expiresAtStr, Qt::ISODate);
+    }
+
+    return TwitchAccountData{
+        .username = username.trimmed(),
+        .userID = userID.trimmed(),
+        .clientID = clientID.trimmed(),
+        .oauthToken = oauthToken.trimmed(),
+        .ty = accountType,
+        .refreshToken = refreshToken,
+        .expiresAt = expiresAt,
+    };
+}
+
+void TwitchAccountData::save() const
+{
+    using QStringSetting = pajlada::Settings::Setting<QString>;
+
+    auto basePath = "/accounts/uid" + this->userID.toStdString();
+    QStringSetting::set(basePath + "/username", this->username);
+    QStringSetting::set(basePath + "/userID", this->userID);
+    QStringSetting::set(basePath + "/clientID", this->clientID);
+    QStringSetting::set(basePath + "/oauthToken", this->oauthToken);
+    EnumStringSetting<TwitchAccount::Type>::set(basePath + "/accountType",
+                                                this->ty);
+    QStringSetting::set(basePath + "/refreshToken", this->refreshToken);
+    if (this->ty == TwitchAccount::Type::DeviceAuth)
+    {
+        QStringSetting::set(basePath + "/expiresAt",
+                            this->expiresAt.toString(Qt::ISODate));
+    }
+}
+
+TwitchAccount::TwitchAccount(const TwitchAccountData &data)
     : Account(ProviderId::Twitch)
-    , oauthClient_(oauthClient)
-    , oauthToken_(oauthToken)
-    , userName_(username)
-    , userId_(userID)
-    , isAnon_(username == ANONYMOUS_USERNAME)
+    , oauthClient_(data.clientID)
+    , oauthToken_(data.oauthToken)
+    , userName_(data.username)
+    , userId_(data.userID)
+    , type_(data.ty)
+    , refreshToken_(data.refreshToken)
+    , expiresAt_(data.expiresAt)
+    , isAnon_(data.username == ANONYMOUS_USERNAME)
     , emoteSets_(std::make_shared<TwitchEmoteSetMap>())
     , emotes_(std::make_shared<EmoteMap>())
 {
@@ -70,6 +130,21 @@ const QString &TwitchAccount::getUserId() const
     return this->userId_;
 }
 
+const QString &TwitchAccount::refreshToken() const
+{
+    return this->refreshToken_;
+}
+
+const QDateTime &TwitchAccount::expiresAt() const
+{
+    return this->expiresAt_;
+}
+
+TwitchAccount::Type TwitchAccount::type() const
+{
+    return this->type_;
+}
+
 QColor TwitchAccount::color()
 {
     return this->color_.get();
@@ -80,28 +155,39 @@ void TwitchAccount::setColor(QColor color)
     this->color_.set(std::move(color));
 }
 
-bool TwitchAccount::setOAuthClient(const QString &newClientID)
+bool TwitchAccount::setData(const TwitchAccountData &data)
 {
-    if (this->oauthClient_.compare(newClientID) == 0)
+    assert(this->userName_ == data.username && this->userId_ == data.userID);
+
+    bool anyUpdate = false;
+
+    if (this->oauthToken_ != data.oauthToken)
     {
-        return false;
+        this->oauthToken_ = data.oauthToken;
+        anyUpdate = true;
+    }
+    if (this->oauthClient_ != data.clientID)
+    {
+        this->oauthClient_ = data.clientID;
+        anyUpdate = true;
+    }
+    if (this->refreshToken_ != data.refreshToken)
+    {
+        this->refreshToken_ = data.refreshToken;
+        anyUpdate = true;
+    }
+    if (this->expiresAt_ != data.expiresAt)
+    {
+        this->expiresAt_ = data.expiresAt;
+        anyUpdate = true;
+    }
+    if (this->type_ != data.ty)
+    {
+        this->type_ = data.ty;
+        anyUpdate = true;
     }
 
-    this->oauthClient_ = newClientID;
-
-    return true;
-}
-
-bool TwitchAccount::setOAuthToken(const QString &newOAuthToken)
-{
-    if (this->oauthToken_.compare(newOAuthToken) == 0)
-    {
-        return false;
-    }
-
-    this->oauthToken_ = newOAuthToken;
-
-    return true;
+    return anyUpdate;
 }
 
 bool TwitchAccount::isAnon() const
diff --git a/src/providers/twitch/TwitchAccount.hpp b/src/providers/twitch/TwitchAccount.hpp
index fe191a850..e14668b50 100644
--- a/src/providers/twitch/TwitchAccount.hpp
+++ b/src/providers/twitch/TwitchAccount.hpp
@@ -12,6 +12,7 @@
 #include <boost/unordered/unordered_flat_map_fwd.hpp>
 #include <pajlada/signals.hpp>
 #include <QColor>
+#include <QDateTime>
 #include <QElapsedTimer>
 #include <QObject>
 #include <QString>
@@ -26,11 +27,41 @@ namespace chatterino {
 class Channel;
 using ChannelPtr = std::shared_ptr<Channel>;
 
+struct TwitchAccountData;
+
 class TwitchAccount : public Account
 {
 public:
-    TwitchAccount(const QString &username, const QString &oauthToken_,
-                  const QString &oauthClient_, const QString &_userID);
+    enum class Type : uint32_t {
+        /// Tokens as obtained from https://dev.twitch.tv/docs/authentication/getting-tokens-oauth/#implicit-grant-flow
+        ImplicitGrant,
+        /// Tokens as obtained from https://dev.twitch.tv/docs/authentication/getting-tokens-oauth/#device-code-grant-flow
+        DeviceAuth,
+    };
+    struct TwitchEmote {
+        EmoteId id;
+        EmoteName name;
+    };
+
+    struct EmoteSet {
+        QString key;
+        QString channelName;
+        QString channelID;
+        QString text;
+        bool subscriber{false};
+        bool local{false};
+        std::vector<TwitchEmote> emotes;
+    };
+
+    struct TwitchAccountEmoteData {
+        std::vector<std::shared_ptr<EmoteSet>> emoteSets;
+
+        // this EmoteMap should contain all emotes available globally
+        // excluding locally available emotes, such as follower ones
+        EmoteMap emotes;
+    };
+
+    TwitchAccount(const TwitchAccountData &data);
     ~TwitchAccount() override;
     TwitchAccount(const TwitchAccount &) = delete;
     TwitchAccount(TwitchAccount &&) = delete;
@@ -43,6 +74,9 @@ public:
     const QString &getOAuthToken() const;
     const QString &getOAuthClient() const;
     const QString &getUserId() const;
+    [[nodiscard]] const QString &refreshToken() const;
+    [[nodiscard]] const QDateTime &expiresAt() const;
+    [[nodiscard]] Type type() const;
 
     /**
      * The Seventv user-id of the current user. 
@@ -53,13 +87,10 @@ public:
     QColor color();
     void setColor(QColor color);
 
-    // Attempts to update the users OAuth Client ID
-    // Returns true if the value has changed, otherwise false
-    bool setOAuthClient(const QString &newClientID);
-
-    // Attempts to update the users OAuth Token
-    // Returns true if the value has changed, otherwise false
-    bool setOAuthToken(const QString &newOAuthToken);
+    /// Attempts to update the account data
+    /// @pre The name and userID must match this account.
+    /// @returns true if the value has changed, otherwise false
+    bool setData(const TwitchAccountData &data);
 
     bool isAnon() const;
 
@@ -112,6 +143,9 @@ private:
     QString oauthToken_;
     QString userName_;
     QString userId_;
+    Type type_ = Type::ImplicitGrant;
+    QString refreshToken_;
+    QDateTime expiresAt_;
     const bool isAnon_;
     Atomic<QColor> color_;
 
@@ -128,4 +162,17 @@ private:
     QString seventvUserID_;
 };
 
+struct TwitchAccountData {
+    QString username;
+    QString userID;
+    QString clientID;
+    QString oauthToken;
+    TwitchAccount::Type ty = TwitchAccount::Type::ImplicitGrant;
+    QString refreshToken;
+    QDateTime expiresAt;
+
+    static std::optional<TwitchAccountData> loadRaw(const std::string &key);
+    void save() const;
+};
+
 }  // namespace chatterino
diff --git a/src/providers/twitch/TwitchAccountManager.cpp b/src/providers/twitch/TwitchAccountManager.cpp
index 7f4ed78a0..41a651eee 100644
--- a/src/providers/twitch/TwitchAccountManager.cpp
+++ b/src/providers/twitch/TwitchAccountManager.cpp
@@ -3,18 +3,132 @@
 #include "Application.hpp"
 #include "common/Args.hpp"
 #include "common/Common.hpp"
+#include "common/Literals.hpp"
+#include "common/network/NetworkResult.hpp"
+#include "common/Outcome.hpp"
 #include "common/QLogging.hpp"
+#include "messages/MessageBuilder.hpp"
 #include "providers/twitch/api/Helix.hpp"
 #include "providers/twitch/TwitchAccount.hpp"
 #include "providers/twitch/TwitchCommon.hpp"
+#include "providers/twitch/TwitchIrcServer.hpp"
 #include "providers/twitch/TwitchUser.hpp"
 #include "util/SharedPtrElementLess.hpp"
 
+#include <QStringBuilder>
+
 namespace chatterino {
 
+using namespace literals;
+
+const QString DEVICE_AUTH_CLIENT_ID = u"ows8k58flcricj1oe1pm53eb78xwql"_s;
+const QString DEVICE_AUTH_SCOPES =
+    u""_s
+    "channel:moderate"  // for seeing automod & which moderator banned/unbanned a user (felanbird unbanned weeb123)
+    " channel:read:redemptions"  // for getting the list of channel point redemptions (not currently used)
+    " chat:edit"      // for sending messages in chat
+    " chat:read"      // for viewing messages in chat
+    " whispers:read"  // for viewing recieved whispers
+
+    // https://dev.twitch.tv/docs/api/reference#start-commercial
+    " channel:edit:commercial"  // for /commercial api
+
+    // https://dev.twitch.tv/docs/api/reference#create-clip
+    " clips:edit"  // for /clip creation
+
+    // https://dev.twitch.tv/docs/api/reference#create-stream-marker
+    // https://dev.twitch.tv/docs/api/reference#modify-channel-information
+    " channel:manage:broadcast"  // for creating stream markers with /marker command, and for the /settitle and /setgame commands
+
+    // https://dev.twitch.tv/docs/api/reference#get-user-block-list
+    " user:read:blocked_users"  // for getting list of blocked users
+
+    // https://dev.twitch.tv/docs/api/reference#block-user
+    // https://dev.twitch.tv/docs/api/reference#unblock-user
+    " user:manage:blocked_users"  // for blocking/unblocking other users
+
+    // https://dev.twitch.tv/docs/api/reference#manage-held-automod-messages
+    " moderator:manage:automod"  // for approving/denying automod messages
+
+    // https://dev.twitch.tv/docs/api/reference#start-a-raid
+    // https://dev.twitch.tv/docs/api/reference#cancel-a-raid
+    " channel:manage:raids"  // for starting/canceling raids
+
+    // https://dev.twitch.tv/docs/api/reference#create-poll
+    // https://dev.twitch.tv/docs/api/reference#end-poll
+    " channel:manage:polls"  // for creating & ending polls (not currently used)
+
+    // https://dev.twitch.tv/docs/api/reference#get-polls
+    " channel:read:polls"  // for reading broadcaster poll status (not currently used)
+
+    // https://dev.twitch.tv/docs/api/reference#create-prediction
+    // https://dev.twitch.tv/docs/api/reference#end-prediction
+    " channel:manage:predictions"  // for creating & ending predictions (not currently used)
+
+    // https://dev.twitch.tv/docs/api/reference#get-predictions
+    " channel:read:predictions"  // for reading broadcaster prediction status (not currently used)
+
+    // https://dev.twitch.tv/docs/api/reference#send-chat-announcement
+    " moderator:manage:announcements"  // for /announce api
+
+    // https://dev.twitch.tv/docs/api/reference#send-whisper
+    " user:manage:whispers"  // for whispers api
+
+    // https://dev.twitch.tv/docs/api/reference#ban-user
+    // https://dev.twitch.tv/docs/api/reference#unban-user
+    " moderator:manage:banned_users"  // for ban/unban/timeout/untimeout api
+
+    // https://dev.twitch.tv/docs/api/reference#delete-chat-messages
+    " moderator:manage:chat_messages"  // for delete message api (/delete, /clear)
+
+    // https://dev.twitch.tv/docs/api/reference#update-user-chat-color
+    " user:manage:chat_color"  // for update user color api (/color coral)
+
+    // https://dev.twitch.tv/docs/api/reference#get-chat-settings
+    " moderator:manage:chat_settings"  // for roomstate api (/followersonly, /uniquechat, /slow)
+
+    // https://dev.twitch.tv/docs/api/reference#get-moderators
+    // https://dev.twitch.tv/docs/api/reference#add-channel-moderator
+    // https://dev.twitch.tv/docs/api/reference#remove-channel-vip
+    " channel:manage:moderators"  // for add/remove/view mod api
+
+    // https://dev.twitch.tv/docs/api/reference#add-channel-vip
+    // https://dev.twitch.tv/docs/api/reference#remove-channel-vip
+    // https://dev.twitch.tv/docs/api/reference#get-vips
+    " channel:manage:vips"  // for add/remove/view vip api
+
+    // https://dev.twitch.tv/docs/api/reference#get-chatters
+    " moderator:read:chatters"  // for get chatters api
+
+    // https://dev.twitch.tv/docs/api/reference#get-shield-mode-status
+    // https://dev.twitch.tv/docs/api/reference#update-shield-mode-status
+    " moderator:manage:shield_mode"  // for reading/managing the channel's shield-mode status
+
+    // https://dev.twitch.tv/docs/api/reference/#send-a-shoutout
+    " moderator:manage:shoutouts"  // for reading/managing the channel's shoutouts (not currently used)
+
+    // https://dev.twitch.tv/docs/api/reference/#get-moderated-channels
+    " user:read:moderated_channels"  // for reading where the user is modded (not currently used)
+
+    // https://dev.twitch.tv/docs/eventsub/eventsub-subscription-types/#channelchatmessage
+    " user:read:chat"  // for reading chat via eventsub (in progress)
+
+    // https://dev.twitch.tv/docs/api/reference/#send-chat-message
+    " user:write:chat"  // for sending chat messages via helix (in testing)
+
+    // https://dev.twitch.tv/docs/api/reference/#get-user-emotes
+    " user:read:emotes"  // for fetching emotes that a user can use via helix
+
+    // https://dev.twitch.tv/docs/api/reference/#warn-chat-user
+    " moderator:manage:warnings"  // for /warn api (and channel.moderate v2 eventsub in the future)
+
+    // https://dev.twitch.tv/docs/api/reference/#get-followed-channels
+    " user:read:follows"  // for determining if the current user follows a streamer
+    ;
+
 TwitchAccountManager::TwitchAccountManager()
     : accounts(SharedPtrElementLess<TwitchAccount>{})
-    , anonymousUser_(new TwitchAccount(ANONYMOUS_USERNAME, "", "", ""))
+    , anonymousUser_(new TwitchAccount({.username = ANONYMOUS_USERNAME}))
 {
     this->currentUserChanged.connect([this] {
         auto currentUser = this->getCurrent();
@@ -27,6 +141,11 @@ TwitchAccountManager::TwitchAccountManager()
     std::ignore = this->accounts.itemRemoved.connect([this](const auto &acc) {
         this->removeUser(acc.item.get());
     });
+
+    this->refreshTask_.start(60000);
+    QObject::connect(&this->refreshTask_, &QTimer::timeout, [this] {
+        this->refreshAccounts(false);
+    });
 }
 
 std::shared_ptr<TwitchAccount> TwitchAccountManager::getCurrent()
@@ -78,8 +197,6 @@ void TwitchAccountManager::reloadUsers()
 {
     auto keys = pajlada::Settings::SettingManager::getObjectKeys("/accounts");
 
-    UserData userData;
-
     bool listUpdated = false;
 
     for (const auto &uid : keys)
@@ -89,39 +206,25 @@ void TwitchAccountManager::reloadUsers()
             continue;
         }
 
-        auto username = pajlada::Settings::Setting<QString>::get(
-            "/accounts/" + uid + "/username");
-        auto userID = pajlada::Settings::Setting<QString>::get("/accounts/" +
-                                                               uid + "/userID");
-        auto clientID = pajlada::Settings::Setting<QString>::get(
-            "/accounts/" + uid + "/clientID");
-        auto oauthToken = pajlada::Settings::Setting<QString>::get(
-            "/accounts/" + uid + "/oauthToken");
-
-        if (username.isEmpty() || userID.isEmpty() || clientID.isEmpty() ||
-            oauthToken.isEmpty())
+        auto userData = TwitchAccountData::loadRaw(uid);
+        if (!userData)
         {
             continue;
         }
 
-        userData.username = username.trimmed();
-        userData.userID = userID.trimmed();
-        userData.clientID = clientID.trimmed();
-        userData.oauthToken = oauthToken.trimmed();
-
-        switch (this->addUser(userData))
+        switch (this->addUser(*userData))
         {
             case AddUserResponse::UserAlreadyExists: {
                 qCDebug(chatterinoTwitch)
-                    << "User" << userData.username << "already exists";
+                    << "User" << userData->username << "already exists";
                 // Do nothing
             }
             break;
             case AddUserResponse::UserValuesUpdated: {
                 qCDebug(chatterinoTwitch)
-                    << "User" << userData.username
+                    << "User" << userData->username
                     << "already exists, and values updated!";
-                if (userData.username == this->getCurrent()->getUserName())
+                if (userData->username == this->getCurrent()->getUserName())
                 {
                     qCDebug(chatterinoTwitch)
                         << "It was the current user, so we need to "
@@ -131,7 +234,7 @@ void TwitchAccountManager::reloadUsers()
             }
             break;
             case AddUserResponse::UserAdded: {
-                qCDebug(chatterinoTwitch) << "Added user" << userData.username;
+                qCDebug(chatterinoTwitch) << "Added user" << userData->username;
                 listUpdated = true;
             }
             break;
@@ -168,8 +271,10 @@ void TwitchAccountManager::load()
             this->currentUser_ = this->anonymousUser_;
         }
 
-        this->currentUserChanged();
-        this->currentUser_->reloadEmotes();
+        this->refreshAccounts(true);
+        this->requestCurrentChecked([this](const auto & /*current*/) {
+            this->currentUser_->reloadEmotes();
+        });
     });
 }
 
@@ -208,37 +313,189 @@ bool TwitchAccountManager::removeUser(TwitchAccount *account)
     return true;
 }
 
+void TwitchAccountManager::refreshAccounts(bool emitChanged)
+{
+    assertInGuiThread();
+    if (this->isRefreshing_)
+    {
+        return;
+    }
+    this->isRefreshing_ = true;
+
+    auto launchedRequests = std::make_shared<size_t>(1);
+    auto tryFlush = [this, launchedRequests, emitChanged] {
+        if (*launchedRequests == 0)
+        {
+            assert(false && "Called tryFlush after a flush");
+            return;
+        }
+
+        if (--(*launchedRequests) == 0)
+        {
+            this->isRefreshing_ = false;
+            auto consumers = std::exchange(this->pendingUserConsumers_, {});
+            for (const auto &consumer : consumers)
+            {
+                consumer(this->currentUser_);
+            }
+            if (emitChanged)
+            {
+                this->currentUserChanged();
+            }
+        }
+    };
+
+    qCDebug(chatterinoTwitch) << "Checking for accounts to refresh";
+
+    auto current = this->currentUser_;
+    auto now = QDateTime::currentDateTimeUtc();
+    for (const auto &account : *this->accounts.readOnly())
+    {
+        if (account->isAnon() ||
+            account->type() != TwitchAccount::Type::DeviceAuth)
+        {
+            continue;
+        }
+        if (now.secsTo(account->expiresAt()) >= 100)
+        {
+            continue;
+        }
+        (*launchedRequests)++;
+        qCDebug(chatterinoTwitch)
+            << "Refreshing user" << account->getUserName();
+
+        QUrlQuery query{
+            {u"client_id"_s, DEVICE_AUTH_CLIENT_ID},
+            {u"scope"_s, DEVICE_AUTH_SCOPES},
+            {u"refresh_token"_s, account->refreshToken()},
+            {u"grant_type"_s, u"refresh_token"_s},
+        };
+        NetworkRequest("https://id.twitch.tv/oauth2/token",
+                       NetworkRequestType::Post)
+            .payload(query.toString(QUrl::FullyEncoded).toUtf8())
+            .timeout(20000)
+            .onSuccess([account, current](const auto &res) {
+                const auto json = res.parseJson();
+                auto accessToken = json["access_token"_L1].toString();
+                auto refreshToken = json["refresh_token"_L1].toString();
+                auto expiresIn = json["expires_in"_L1].toInt(-1);
+                if (accessToken.isEmpty() || refreshToken.isEmpty() ||
+                    expiresIn <= 0)
+                {
+                    qCWarning(chatterinoTwitch)
+                        << "Received invalid OAuth response when refreshing"
+                        << account->getUserName();
+                    return;
+                }
+                auto expiresAt =
+                    QDateTime::currentDateTimeUtc().addSecs(expiresIn - 120);
+                TwitchAccountData data{
+                    .username = account->getUserName(),
+                    .userID = account->getUserId(),
+                    .clientID = DEVICE_AUTH_CLIENT_ID,
+                    .oauthToken = accessToken,
+                    .ty = TwitchAccount::Type::DeviceAuth,
+                    .refreshToken = refreshToken,
+                    .expiresAt = expiresAt,
+                };
+                data.save();
+                account->setData(data);
+                pajlada::Settings::SettingManager::getInstance()->save();
+                qCDebug(chatterinoTwitch)
+                    << "Refreshed user" << account->getUserName();
+
+                if (account == current)
+                {
+                    getHelix()->update(DEVICE_AUTH_CLIENT_ID,
+                                       account->getOAuthToken());
+                }
+            })
+            .onError([this, account](const auto &res) {
+                auto json = res.parseJson();
+                QString message = u"Failed to refresh OAuth token for " %
+                                  account->getUserName() % u" (" %
+                                  res.formatError() % u" - " %
+                                  json["message"_L1].toString(u"no message"_s) %
+                                  u").";
+                qCWarning(chatterinoTwitch) << message;
+
+                if (account == this->getCurrent())
+                {
+                    if (res.status().value_or(0) == 400)  // invalid token
+                    {
+                        auto msg =
+                            MessageBuilder::makeAccountExpiredMessage(message);
+                        getApp()->getTwitch()->forEachChannel(
+                            [msg](const auto &chan) {
+                                chan->addMessage(msg, MessageContext::Original);
+                            });
+                    }
+                    else
+                    {
+                        getApp()->getTwitch()->addGlobalSystemMessage(message);
+                    }
+                }
+            })
+            .finally(tryFlush)
+            .execute();
+    }
+    tryFlush();  // if no account was refreshed
+}
+
+void TwitchAccountManager::requestCurrent(UserCallback cb)
+{
+    assertInGuiThread();
+    if (this->isRefreshing_)
+    {
+        this->pendingUserConsumers_.emplace_back(std::move(cb));
+        return;
+    }
+
+    cb(this->currentUser_);
+}
+
+void TwitchAccountManager::requestCurrentChecked(UserCallback cb)
+{
+    assertInGuiThread();
+    this->recheckRefresher();
+    this->requestCurrent(std::move(cb));
+}
+
+void TwitchAccountManager::recheckRefresher()
+{
+    auto now = QDateTime::currentDateTimeUtc();
+    for (const auto &account : *this->accounts.readOnly())
+    {
+        if (account->isAnon() ||
+            account->type() != TwitchAccount::Type::DeviceAuth)
+        {
+            continue;
+        }
+        if (now.secsTo(account->expiresAt()) < 1000)
+        {
+            this->refreshAccounts(false);
+            return;
+        }
+    }
+}
+
 TwitchAccountManager::AddUserResponse TwitchAccountManager::addUser(
-    const TwitchAccountManager::UserData &userData)
+    const TwitchAccountData &userData)
 {
     auto previousUser = this->findUserByUsername(userData.username);
     if (previousUser)
     {
-        bool userUpdated = false;
-
-        if (previousUser->setOAuthClient(userData.clientID))
-        {
-            userUpdated = true;
-        }
-
-        if (previousUser->setOAuthToken(userData.oauthToken))
-        {
-            userUpdated = true;
-        }
+        bool userUpdated = previousUser->setData(userData);
 
         if (userUpdated)
         {
             return AddUserResponse::UserValuesUpdated;
         }
-        else
-        {
-            return AddUserResponse::UserAlreadyExists;
-        }
+
+        return AddUserResponse::UserAlreadyExists;
     }
 
-    auto newUser =
-        std::make_shared<TwitchAccount>(userData.username, userData.oauthToken,
-                                        userData.clientID, userData.userID);
+    auto newUser = std::make_shared<TwitchAccount>(userData);
 
     //    std::lock_guard<std::mutex> lock(this->mutex);
 
diff --git a/src/providers/twitch/TwitchAccountManager.hpp b/src/providers/twitch/TwitchAccountManager.hpp
index d0e21111d..ce6698318 100644
--- a/src/providers/twitch/TwitchAccountManager.hpp
+++ b/src/providers/twitch/TwitchAccountManager.hpp
@@ -8,6 +8,7 @@
 
 #include <boost/signals2.hpp>
 #include <QString>
+#include <QTimer>
 
 #include <memory>
 #include <mutex>
@@ -22,24 +23,30 @@
 namespace chatterino {
 
 class TwitchAccount;
+struct TwitchAccountData;
 class AccountController;
 
+extern const QString DEVICE_AUTH_SCOPES;
+extern const QString DEVICE_AUTH_CLIENT_ID;
+
 class TwitchAccountManager
 {
     TwitchAccountManager();
 
 public:
-    struct UserData {
-        QString username;
-        QString userID;
-        QString clientID;
-        QString oauthToken;
-    };
+    struct UserData;
+    using UserCallback =
+        std::function<void(const std::shared_ptr<TwitchAccount> &)>;
 
     // Returns the current twitchUsers, or the anonymous user if we're not
     // currently logged in
     std::shared_ptr<TwitchAccount> getCurrent();
 
+    void requestCurrent(UserCallback cb);
+    void requestCurrentChecked(UserCallback cb);
+
+    void recheckRefresher();
+
     std::vector<QString> getUsernames() const;
 
     std::shared_ptr<TwitchAccount> findUserByUsername(
@@ -69,8 +76,13 @@ private:
         UserValuesUpdated,
         UserAdded,
     };
-    AddUserResponse addUser(const UserData &data);
+    AddUserResponse addUser(const TwitchAccountData &data);
     bool removeUser(TwitchAccount *account);
+    void refreshAccounts(bool emitChanged);
+
+    bool isRefreshing_ = false;
+    std::vector<UserCallback> pendingUserConsumers_;
+    QTimer refreshTask_;
 
     std::shared_ptr<TwitchAccount> currentUser_;
 
diff --git a/src/providers/twitch/TwitchChannel.cpp b/src/providers/twitch/TwitchChannel.cpp
index 0371fd295..e49f9b2e1 100644
--- a/src/providers/twitch/TwitchChannel.cpp
+++ b/src/providers/twitch/TwitchChannel.cpp
@@ -100,6 +100,10 @@ TwitchChannel::TwitchChannel(const QString &name)
 
     this->bSignals_.emplace_back(
         getApp()->getAccounts()->twitch.currentUserChanged.connect([this] {
+            if (this->roomId().isEmpty())
+            {
+                return;
+            }
             this->setMod(false);
             this->refreshPubSub();
             this->refreshTwitchChannelEmotes(false);
@@ -234,6 +238,21 @@ void TwitchChannel::setLocalizedName(const QString &name)
 }
 
 void TwitchChannel::refreshTwitchChannelEmotes(bool manualRefresh)
+{
+    // ensure the user is authenticated
+    getApp()->getAccounts()->twitch.requestCurrentChecked(
+        [weak{this->weak_from_this()}, manualRefresh](const auto &account) {
+            auto self = std::dynamic_pointer_cast<TwitchChannel>(weak.lock());
+            if (!self)
+            {
+                return;
+            }
+            self->refreshTwitchChannelEmotesFor(account, manualRefresh);
+        });
+}
+
+void TwitchChannel::refreshTwitchChannelEmotesFor(
+    const std::shared_ptr<TwitchAccount> &account, bool manualRefresh)
 {
     if (getApp()->isTest())
     {
@@ -242,15 +261,14 @@ void TwitchChannel::refreshTwitchChannelEmotes(bool manualRefresh)
 
     if (manualRefresh)
     {
-        getApp()->getAccounts()->twitch.getCurrent()->reloadEmotes(this);
+        account->reloadEmotes(this);
     }
 
     // Twitch's 'Get User Emotes' doesn't assigns a different set-ID to follower
     // emotes compared to subscriber emotes.
     QString setID = TWITCH_SUB_EMOTE_SET_PREFIX % this->roomId();
     this->localTwitchEmoteSetID_.set(setID);
-    if (getApp()->getAccounts()->twitch.getCurrent()->hasEmoteSet(
-            EmoteSetId{setID}))
+    if (account->hasEmoteSet(EmoteSetId{setID}))
     {
         this->localTwitchEmotes_.set(std::make_shared<EmoteMap>());
         return;
@@ -273,8 +291,7 @@ void TwitchChannel::refreshTwitchChannelEmotes(bool manualRefresh)
     };
 
     getHelix()->getFollowedChannel(
-        getApp()->getAccounts()->twitch.getCurrent()->getUserId(),
-        this->roomId(), nullptr,
+        account->getUserId(), this->roomId(), nullptr,
         [weak{this->weak_from_this()}, makeEmotes](const auto &chan) {
             auto self = std::dynamic_pointer_cast<TwitchChannel>(weak.lock());
             if (!self || !chan)
diff --git a/src/providers/twitch/TwitchChannel.hpp b/src/providers/twitch/TwitchChannel.hpp
index 484b52bbb..5882e4c27 100644
--- a/src/providers/twitch/TwitchChannel.hpp
+++ b/src/providers/twitch/TwitchChannel.hpp
@@ -35,6 +35,7 @@ struct Emote;
 using EmotePtr = std::shared_ptr<const Emote>;
 class EmoteMap;
 
+class TwitchAccount;
 class TwitchBadges;
 class FfzEmotes;
 class BttvEmotes;
@@ -342,6 +343,9 @@ private:
     void cleanUpReplyThreads();
     void showLoginMessage();
 
+    void refreshTwitchChannelEmotesFor(
+        const std::shared_ptr<TwitchAccount> &account, bool manualRefresh);
+
     /// roomIdChanged is called whenever this channel's ID has been changed
     /// This should only happen once per channel, whenever the ID goes from unset to set
     void roomIdChanged();
diff --git a/src/providers/twitch/TwitchIrcServer.cpp b/src/providers/twitch/TwitchIrcServer.cpp
index 901ac0525..d0d366ed1 100644
--- a/src/providers/twitch/TwitchIrcServer.cpp
+++ b/src/providers/twitch/TwitchIrcServer.cpp
@@ -225,6 +225,19 @@ TwitchIrcServer::TwitchIrcServer()
     this->connections_.managedConnect(this->readConnection_->heartbeat, [this] {
         this->markChannelsConnected();
     });
+
+    QObject::connect(
+        this->writeConnection_.get(),
+        &IrcConnection::connectAndInitializeRequested, this, [this]() {
+            this->initializeConnection(this->writeConnection_.get(),
+                                       ConnectionType::Write);
+        });
+    QObject::connect(this->readConnection_.get(),
+                     &IrcConnection::connectAndInitializeRequested, this,
+                     [this]() {
+                         this->initializeConnection(this->readConnection_.get(),
+                                                    ConnectionType::Read);
+                     });
 }
 
 void TwitchIrcServer::initialize()
@@ -712,49 +725,50 @@ void TwitchIrcServer::initialize()
 void TwitchIrcServer::initializeConnection(IrcConnection *connection,
                                            ConnectionType type)
 {
-    std::shared_ptr<TwitchAccount> account =
-        getApp()->getAccounts()->twitch.getCurrent();
+    getApp()->getAccounts()->twitch.requestCurrentChecked([this, connection,
+                                                           type](const auto
+                                                                     &account) {
+        qCDebug(chatterinoTwitch) << "logging in as" << account->getUserName();
 
-    qCDebug(chatterinoTwitch) << "logging in as" << account->getUserName();
+        // twitch.tv/tags enables IRCv3 tags on messages. See https://dev.twitch.tv/docs/irc/tags
+        // twitch.tv/commands enables a bunch of miscellaneous command capabilities. See https://dev.twitch.tv/docs/irc/commands
+        // twitch.tv/membership enables the JOIN/PART/NAMES commands. See https://dev.twitch.tv/docs/irc/membership
+        // This is enabled so we receive USERSTATE messages when joining channels / typing messages, along with the other command capabilities
+        QStringList caps{"twitch.tv/tags", "twitch.tv/commands"};
+        if (type != ConnectionType::Write)
+        {
+            caps.push_back("twitch.tv/membership");
+        }
 
-    // twitch.tv/tags enables IRCv3 tags on messages. See https://dev.twitch.tv/docs/irc/tags
-    // twitch.tv/commands enables a bunch of miscellaneous command capabilities. See https://dev.twitch.tv/docs/irc/commands
-    // twitch.tv/membership enables the JOIN/PART/NAMES commands. See https://dev.twitch.tv/docs/irc/membership
-    // This is enabled so we receive USERSTATE messages when joining channels / typing messages, along with the other command capabilities
-    QStringList caps{"twitch.tv/tags", "twitch.tv/commands"};
-    if (type != ConnectionType::Write)
-    {
-        caps.push_back("twitch.tv/membership");
-    }
+        connection->network()->setSkipCapabilityValidation(true);
+        connection->network()->setRequestedCapabilities(caps);
 
-    connection->network()->setSkipCapabilityValidation(true);
-    connection->network()->setRequestedCapabilities(caps);
+        QString username = account->getUserName();
+        QString oauthToken = account->getOAuthToken();
 
-    QString username = account->getUserName();
-    QString oauthToken = account->getOAuthToken();
+        if (!oauthToken.startsWith("oauth:"))
+        {
+            oauthToken.prepend("oauth:");
+        }
 
-    if (!oauthToken.startsWith("oauth:"))
-    {
-        oauthToken.prepend("oauth:");
-    }
+        connection->setUserName(username);
+        connection->setNickName(username);
+        connection->setRealName(username);
 
-    connection->setUserName(username);
-    connection->setNickName(username);
-    connection->setRealName(username);
+        if (!account->isAnon())
+        {
+            connection->setPassword(oauthToken);
+        }
 
-    if (!account->isAnon())
-    {
-        connection->setPassword(oauthToken);
-    }
+        // https://dev.twitch.tv/docs/irc#connecting-to-the-twitch-irc-server
+        // SSL disabled: irc://irc.chat.twitch.tv:6667 (or port 80)
+        // SSL enabled: irc://irc.chat.twitch.tv:6697 (or port 443)
+        connection->setHost(Env::get().twitchServerHost);
+        connection->setPort(Env::get().twitchServerPort);
+        connection->setSecure(Env::get().twitchServerSecure);
 
-    // https://dev.twitch.tv/docs/irc#connecting-to-the-twitch-irc-server
-    // SSL disabled: irc://irc.chat.twitch.tv:6667 (or port 80)
-    // SSL enabled: irc://irc.chat.twitch.tv:6697 (or port 443)
-    connection->setHost(Env::get().twitchServerHost);
-    connection->setPort(Env::get().twitchServerPort);
-    connection->setSecure(Env::get().twitchServerSecure);
-
-    this->open(type);
+        this->open(type);
+    });
 }
 
 std::shared_ptr<Channel> TwitchIrcServer::createChannel(
diff --git a/src/widgets/dialogs/LoginDialog.cpp b/src/widgets/dialogs/LoginDialog.cpp
index 5664acc35..fde38b943 100644
--- a/src/widgets/dialogs/LoginDialog.cpp
+++ b/src/widgets/dialogs/LoginDialog.cpp
@@ -2,10 +2,15 @@
 
 #include "Application.hpp"
 #include "common/Common.hpp"
+#include "common/Literals.hpp"
 #include "common/network/NetworkRequest.hpp"
+#include "common/network/NetworkResult.hpp"
+#include "common/Outcome.hpp"
 #include "common/QLogging.hpp"
 #include "controllers/accounts/AccountController.hpp"
+#include "providers/twitch/api/Helix.hpp"
 #include "providers/twitch/TwitchAccount.hpp"
+#include "singletons/StreamerMode.hpp"
 #include "util/Clipboard.hpp"
 #include "util/Helpers.hpp"
 
@@ -17,62 +22,369 @@
 #include <QClipboard>
 #include <QDebug>
 #include <QDesktopServices>
+#include <QFontDatabase>
 #include <QMessageBox>
+#include <QPointer>
 #include <QUrl>
-
-namespace chatterino {
+#include <QUrlQuery>
 
 namespace {
 
-    bool logInWithCredentials(QWidget *parent, const QString &userID,
-                              const QString &username, const QString &clientID,
-                              const QString &oauthToken)
+using namespace chatterino;
+using namespace literals;
+
+bool logInWithImplicitGrantCredentials(QWidget *parent, const QString &userID,
+                                       const QString &username,
+                                       const QString &clientID,
+                                       const QString &oauthToken)
+{
+    QStringList errors;
+
+    if (userID.isEmpty())
     {
-        QStringList errors;
-
-        if (userID.isEmpty())
-        {
-            errors.append("Missing user ID");
-        }
-        if (username.isEmpty())
-        {
-            errors.append("Missing username");
-        }
-        if (clientID.isEmpty())
-        {
-            errors.append("Missing Client ID");
-        }
-        if (oauthToken.isEmpty())
-        {
-            errors.append("Missing OAuth Token");
-        }
-
-        if (errors.length() > 0)
-        {
-            QMessageBox messageBox(parent);
-            messageBox.setWindowTitle("Invalid account credentials");
-            messageBox.setIcon(QMessageBox::Critical);
-            messageBox.setText(errors.join("<br>"));
-            messageBox.exec();
-            return false;
-        }
-
-        std::string basePath = "/accounts/uid" + userID.toStdString();
-        pajlada::Settings::Setting<QString>::set(basePath + "/username",
-                                                 username);
-        pajlada::Settings::Setting<QString>::set(basePath + "/userID", userID);
-        pajlada::Settings::Setting<QString>::set(basePath + "/clientID",
-                                                 clientID);
-        pajlada::Settings::Setting<QString>::set(basePath + "/oauthToken",
-                                                 oauthToken);
-
-        getApp()->getAccounts()->twitch.reloadUsers();
-        getApp()->getAccounts()->twitch.currentUsername = username;
-        return true;
+        errors.append("Missing user ID");
+    }
+    if (username.isEmpty())
+    {
+        errors.append("Missing username");
+    }
+    if (clientID.isEmpty())
+    {
+        errors.append("Missing Client ID");
+    }
+    if (oauthToken.isEmpty())
+    {
+        errors.append("Missing OAuth Token");
     }
 
+    if (!errors.empty())
+    {
+        QMessageBox messageBox(parent);
+        messageBox.setWindowTitle("Invalid account credentials");
+        messageBox.setIcon(QMessageBox::Critical);
+        messageBox.setText(errors.join("<br>"));
+        messageBox.exec();
+        return false;
+    }
+
+    TwitchAccountData{
+        .username = username,
+        .userID = userID,
+        .clientID = clientID,
+        .oauthToken = oauthToken,
+        .ty = TwitchAccount::Type::ImplicitGrant,
+        .refreshToken = {},
+        .expiresAt = {},
+    }
+        .save();
+
+    getApp()->getAccounts()->twitch.reloadUsers();
+    getApp()->getAccounts()->twitch.currentUsername = username;
+    return true;
+}
+
+class DeviceLoginWidget : public QWidget
+{
+public:
+    DeviceLoginWidget();
+
+private:
+    void reset(const QString &prevError = {});
+    void tryInitSession(const QJsonObject &response);
+    void displayError(const QString &error);
+
+    void ping();
+
+    void updateCurrentWidget(QWidget *next);
+
+    QHBoxLayout layout;
+    QLabel *detailLabel = nullptr;
+
+    QTimer expiryTimer_;
+    QTimer pingTimer_;
+    QString verificationUri_;
+    QString userCode_;
+    QString deviceCode_;
+};
+
+DeviceLoginWidget::DeviceLoginWidget()
+{
+    QObject::connect(&this->pingTimer_, &QTimer::timeout, [this] {
+        this->ping();
+    });
+    QObject::connect(&this->expiryTimer_, &QTimer::timeout, [this] {
+        this->reset(u"The code expired."_s);
+    });
+    this->setLayout(&this->layout);
+    this->reset();
+}
+
+void DeviceLoginWidget::updateCurrentWidget(QWidget *next)
+{
+    // clear the layout
+    QLayoutItem *prev = nullptr;
+    while ((prev = this->layout.takeAt(0)))
+    {
+        delete prev->widget();
+        delete prev;
+    }
+
+    // insert the item
+    this->layout.addWidget(next, 1, Qt::AlignCenter);
+}
+
+void DeviceLoginWidget::reset(const QString &prevError)
+{
+    this->expiryTimer_.stop();
+    this->pingTimer_.stop();
+
+    auto *wrap = new QWidget;
+    auto *layout = new QVBoxLayout(wrap);
+
+    auto *titleLabel = new QLabel(u"Click on 'Start' to connect an account!"_s);
+    this->detailLabel = new QLabel(prevError);
+    this->detailLabel->setWordWrap(true);
+    layout->addWidget(titleLabel, 1, Qt::AlignCenter);
+    layout->addWidget(this->detailLabel, 0, Qt::AlignCenter);
+
+    auto *startButton = new QPushButton(u"Start"_s);
+    connect(startButton, &QPushButton::clicked, this, [this] {
+        QUrlQuery query{
+            {u"client_id"_s, DEVICE_AUTH_CLIENT_ID},
+            {u"scopes"_s, DEVICE_AUTH_SCOPES},
+        };
+        NetworkRequest(u"https://id.twitch.tv/oauth2/device"_s,
+                       NetworkRequestType::Post)
+            .payload(query.toString(QUrl::FullyEncoded).toUtf8())
+            .timeout(10000)
+            .caller(this)
+            .onSuccess([this](const auto &res) {
+                this->tryInitSession(res.parseJson());
+                return Success;
+            })
+            .onError([this](const auto &res) {
+                const auto json = res.parseJson();
+                this->displayError(
+                    json["message"_L1].toString(u"error: (no message)"_s));
+            })
+            .execute();
+    });
+    layout->addWidget(startButton);
+
+    this->updateCurrentWidget(wrap);
+}
+
+void DeviceLoginWidget::tryInitSession(const QJsonObject &response)
+{
+    auto getString = [&](auto key, QString &dest) {
+        const auto val = response[key];
+        if (!val.isString())
+        {
+            return false;
+        }
+        dest = val.toString();
+        return true;
+    };
+    if (!getString("device_code"_L1, this->deviceCode_))
+    {
+        this->displayError(u"Failed to initialize: missing 'device_code'"_s);
+        return;
+    }
+    if (!getString("user_code"_L1, this->userCode_))
+    {
+        this->displayError(u"Failed to initialize: missing 'user_code'"_s);
+        return;
+    }
+    if (!getString("verification_uri"_L1, this->verificationUri_))
+    {
+        this->displayError(
+            u"Failed to initialize: missing 'verification_uri'"_s);
+        return;
+    }
+    const auto expiry = response["expires_in"_L1];
+    if (!expiry.isDouble())
+    {
+        this->displayError(u"Failed to initialize: missing 'expires_in'"_s);
+        return;
+    }
+    this->expiryTimer_.start(expiry.toInt(1800) * 1000);
+    this->pingTimer_.start(response["interval"_L1].toInt(5) * 1000);
+
+    auto *wrap = new QWidget;
+    auto *layout = new QVBoxLayout(wrap);
+
+    // A simplified link split by the code, such that
+    // prefixUrl is the part before the code and postfixUrl
+    // is the part after the code.
+    auto [prefixUrl, postfixUrl] = [&] {
+        QStringView view(this->verificationUri_);
+        // TODO(Qt 6): use .sliced()
+        if (view.startsWith(u"https://"))
+        {
+            view = view.mid(8);
+        }
+        if (view.startsWith(u"www."))
+        {
+            view = view.mid(4);
+        }
+
+        auto idx = view.indexOf(this->userCode_);
+        if (idx < 0)
+        {
+            return std::make_tuple(view, QStringView());
+        }
+
+        return std::make_tuple(view.mid(0, idx),
+                               view.mid(idx + this->userCode_.length()));
+    }();
+
+    // <a href={verificationUri}>
+    //   <span>{prefixUrl}</span>
+    //   <span style="font-size: large">{userCode}</span>
+    //   <span>{postfixUrl}</span>
+    // </a>
+    auto *userCode = new QLabel(
+        u"<a href=\"%1\"><span>%2</span><span style=\"font-size: large\">%3</span><span>%4</span></a>"_s
+            .arg(this->verificationUri_, prefixUrl, this->userCode_,
+                 postfixUrl));
+    userCode->setOpenExternalLinks(true);
+    userCode->setTextInteractionFlags(Qt::TextBrowserInteraction);
+    if (getApp()->getStreamerMode()->isEnabled())
+    {
+        userCode->setText(
+            u"You're in streamer mode.\nUse the buttons below.\nDon't show the code on stream!"_s);
+    }
+    layout->addWidget(userCode, 1, Qt::AlignCenter);
+
+    this->detailLabel = new QLabel;
+    layout->addWidget(this->detailLabel, 0, Qt::AlignCenter);
+
+    {
+        auto *hbox = new QHBoxLayout;
+
+        auto addButton = [&](auto text, auto handler) {
+            auto *button = new QPushButton(text);
+            connect(button, &QPushButton::clicked, handler);
+            hbox->addWidget(button, 1);
+        };
+        addButton(u"Copy code"_s, [this] {
+            crossPlatformCopy(this->userCode_);
+        });
+        addButton(u"Copy URL"_s, [this] {
+            crossPlatformCopy(this->verificationUri_);
+        });
+        addButton(u"Open URL"_s, [this] {
+            if (!QDesktopServices::openUrl(QUrl(this->verificationUri_)))
+            {
+                qCWarning(chatterinoWidget) << "open login in browser failed";
+                this->displayError(u"Failed to open browser"_s);
+            }
+        });
+        layout->addLayout(hbox, 1);
+    }
+
+    this->updateCurrentWidget(wrap);
+}
+
+void DeviceLoginWidget::displayError(const QString &error)
+{
+    if (this->detailLabel)
+    {
+        this->detailLabel->setText(error);
+    }
+    else
+    {
+        qCWarning(chatterinoWidget)
+            << "Tried to display error but no detail label was found - error:"
+            << error;
+    }
+}
+
+void DeviceLoginWidget::ping()
+{
+    QUrlQuery query{
+        {u"client_id"_s, DEVICE_AUTH_CLIENT_ID},
+        {u"scope"_s, DEVICE_AUTH_SCOPES},
+        {u"device_code"_s, this->deviceCode_},
+        {u"grant_type"_s, u"urn:ietf:params:oauth:grant-type:device_code"_s},
+    };
+
+    NetworkRequest(u"https://id.twitch.tv/oauth2/token"_s,
+                   NetworkRequestType::Post)
+        .caller(this)
+        .timeout((this->pingTimer_.interval() * 9) / 10)
+        .payload(query.toString(QUrl::FullyEncoded).toUtf8())
+        .onSuccess([this](const auto &res) {
+            const auto json = res.parseJson();
+            auto accessToken = json["access_token"_L1].toString();
+            auto refreshToken = json["refresh_token"_L1].toString();
+            auto expiresIn = json["expires_in"_L1].toInt(-1);
+            if (accessToken.isEmpty() || refreshToken.isEmpty() ||
+                expiresIn <= 0)
+            {
+                this->displayError("Received malformed response");
+                return;
+            }
+            auto expiresAt =
+                QDateTime::currentDateTimeUtc().addSecs(expiresIn - 120);
+            QPointer self(this);
+            auto helix = std::make_shared<Helix>();
+            helix->update(DEVICE_AUTH_CLIENT_ID, accessToken);
+            helix->fetchUsers(
+                {}, {},
+                [self, helix, refreshToken, accessToken,
+                 expiresAt](const auto &res) {
+                    if (res.empty())
+                    {
+                        if (self)
+                        {
+                            self->displayError("No user associated with token");
+                        }
+                        return;
+                    }
+                    const auto &user = res.front();
+                    TwitchAccountData{
+                        .username = user.login,
+                        .userID = user.id,
+                        .clientID = DEVICE_AUTH_CLIENT_ID,
+                        .oauthToken = accessToken,
+                        .ty = TwitchAccount::Type::DeviceAuth,
+                        .refreshToken = refreshToken,
+                        .expiresAt = expiresAt,
+                    }
+                        .save();
+                    getApp()->getAccounts()->twitch.reloadUsers();
+                    getApp()->getAccounts()->twitch.currentUsername =
+                        user.login;
+
+                    if (self)
+                    {
+                        self->window()->close();
+                    }
+                },
+                [self]() {
+                    if (self)
+                    {
+                        self->displayError(
+                            u"Failed to fetch authenticated user"_s);
+                    }
+                });
+        })
+        .onError([this](const auto &res) {
+            auto json = res.parseJson();
+            auto message = json["message"_L1].toString(u"(no message)"_s);
+            if (message != u"authorization_pending"_s)
+            {
+                this->displayError(res.formatError() + u" - "_s + message);
+            }
+        })
+        .execute();
+}
+
 }  // namespace
 
+namespace chatterino {
+
 BasicLoginWidget::BasicLoginWidget()
 {
     const QString logInLink = "https://chatterino.com/client_login";
@@ -145,7 +457,8 @@ BasicLoginWidget::BasicLoginWidget()
             }
         }
 
-        if (logInWithCredentials(this, userID, username, clientID, oauthToken))
+        if (logInWithImplicitGrantCredentials(this, userID, username, clientID,
+                                              oauthToken))
         {
             this->window()->close();
         }
@@ -215,8 +528,8 @@ AdvancedLoginWidget::AdvancedLoginWidget()
                 QString clientID = this->ui_.clientIDInput.text();
                 QString oauthToken = this->ui_.oauthTokenInput.text();
 
-                logInWithCredentials(this, userID, username, clientID,
-                                     oauthToken);
+                logInWithImplicitGrantCredentials(this, userID, username,
+                                                  clientID, oauthToken);
             });
 }
 
@@ -238,7 +551,7 @@ void AdvancedLoginWidget::refreshButtons()
 LoginDialog::LoginDialog(QWidget *parent)
     : QDialog(parent)
 {
-    this->setMinimumWidth(300);
+    this->setMinimumWidth(400);
     this->setWindowFlags(
         (this->windowFlags() & ~(Qt::WindowContextHelpButtonHint)) |
         Qt::Dialog | Qt::MSWindowsFixedSizeDialogHint);
@@ -248,6 +561,7 @@ LoginDialog::LoginDialog(QWidget *parent)
     this->setLayout(&this->ui_.mainLayout);
     this->ui_.mainLayout.addWidget(&this->ui_.tabWidget);
 
+    this->ui_.tabWidget.addTab(new DeviceLoginWidget, "Device");
     this->ui_.tabWidget.addTab(&this->ui_.basic, "Basic");
     this->ui_.tabWidget.addTab(&this->ui_.advanced, "Advanced");
 
diff --git a/tests/src/Commands.cpp b/tests/src/Commands.cpp
index e44366f20..b319cd15b 100644
--- a/tests/src/Commands.cpp
+++ b/tests/src/Commands.cpp
@@ -873,9 +873,15 @@ TEST(Commands, E2E)
     EXPECT_CALL(mockHelix, update).Times(1);
     EXPECT_CALL(mockHelix, loadBlocks).Times(1);
 
-    auto account = std::make_shared<TwitchAccount>(
-        testaccount420["login"].toString(), "token", "oauthclient",
-        testaccount420["id"].toString());
+    auto account = std::make_shared<TwitchAccount>(TwitchAccountData{
+        .username = testaccount420["login"].toString(),
+        .userID = testaccount420["id"].toString(),
+        .clientID = "oauthclient",
+        .oauthToken = "token",
+        .ty = TwitchAccount::Type::ImplicitGrant,
+        .refreshToken = {},
+        .expiresAt = {},
+    });
     getApp()->getAccounts()->twitch.accounts.append(account);
     getApp()->getAccounts()->twitch.currentUsername =
         testaccount420["login"].toString();
diff --git a/tests/src/TwitchPubSubClient.cpp b/tests/src/TwitchPubSubClient.cpp
index e195d937b..497d0ee05 100644
--- a/tests/src/TwitchPubSubClient.cpp
+++ b/tests/src/TwitchPubSubClient.cpp
@@ -10,6 +10,7 @@
 
 #include <chrono>
 #include <mutex>
+#include <utility>
 
 using namespace chatterino;
 using namespace std::chrono_literals;
@@ -82,8 +83,15 @@ public:
                    QString token = "token")
         : PubSub(QString("wss://127.0.0.1:9050%1").arg(path), pingInterval)
     {
-        auto account = std::make_shared<TwitchAccount>("testaccount_420", token,
-                                                       "clientid", "123456");
+        auto account = std::make_shared<TwitchAccount>(TwitchAccountData{
+            .username = "testaccount_420",
+            .userID = "123456",
+            .clientID = "clientid",
+            .oauthToken = std::move(token),
+            .ty = TwitchAccount::Type::ImplicitGrant,
+            .refreshToken = {},
+            .expiresAt = {},
+        });
         this->setAccount(account);
     }
 };