flutter-supabase-oauth

To implement Google Sign-In in Flutter with Supabase authentication, you use the google_sign_in package to handle the OpenID Connect flow and validate ID tokens to issue a Supabase JWT-based session for the authenticated user.

The best way to configure OAuth client IDs for Flutter Google Sign-In is to set up clients in Google Cloud Console and define them in AppConfig with sensible fallbacks. This ensures Web, Android, and iOS platforms are correctly configured for Supabase authentication.

Yes, you can use OpenID Connect with Supabase authentication for both Android and iOS Flutter apps. This integration applies to mobile and web Flutter projects requiring Google or Apple sign-in flows across both development and production environments.

To handle authentication errors during Flutter Google Sign-In, you translate the authentication errors using AppLocalizations. This allows your Flutter application to present friendly, localized error messages to users when the OIDC or Supabase session creation fails.

Yes, you need the google_sign_in package to connect Flutter OpenID Connect tokens to Supabase. It is required to retrieve the ID tokens from Google, which are then validated by Supabase authentication to issue a JWT-based user session.

Supabase Google Sign-In fails to create a Flutter user session in production when OAuth client IDs are missing or misconfigured. You must configure AppConfig with proper fallbacks for your production environment to ensure the ID token validation succeeds.