[google_sign_in] Allow initialization from Dart without adding native config files

[pr-Mais]

Description

In the latest release of FlutterFire plugins, initialization of the DEFAULT Firebase App through Dart has been added, omitting the manual installation step, and enabling flutterfire_cli tool to make this step completely automatic.

Unfortunately, if the app is using google_sign_in, it requires developers to add back the manual installation step even though firebase_auth does support Dart-only initialization, as mentioned here.

Proposal

Allowing google_sign_in to initialize from Dart will make it possible for firebase_auth users to completely migrate to use Dart initialization through flutterfire_cli.

[loolooii]

Any update on this?

[marcusrohden]

Hey guys any updates? thanks again.

[crisboarna]

Would be amazing to have this complete !