Example project using Flutter and MobX to authenticate an user with Discord's OAuth2 flow. Since the User Token has just few uses according to the docs, it just shows the User Info and the Guilds Info.
It is easily customizable to any OAuth2 services implementing PKCE.
It can save the credentials via SharedPreferences (no need to login again) along with a cool theme switcher (light/dark) and a custom discord icon.
There are better ways to store your app credentials, I do NOT recommend using this model to publish your app.
Discord OAuth2 Docs: https://discord.com/developers/docs/topics/oauth2
Discord Application Page: https://discord.com/developers/applications
Flutter Docs: https://flutter.dev/docs
Dart OAuth2: https://pub.dev/packages/oauth2
Flutter MobX: https://pub.dev/packages/mobx
Flutter Webview: https://pub.dev/packages/webview_flutter
