[Auth-UI] [v10.0.0-beta02] FirebaseAuthUI is not initialized with the proper FirebaseApp key

[nerocristallo]

I am updating the library from version 8.x.x to version 10.x.x and have encountered the following problem:

My current implementation uses a specific Firebase app for authentication and another app for all other services.

With version 8.x.x, this was not an issue since I could pass the Firebase app when the app retrieved the FirebaseAuthUI instance.

        FirebaseOptions options = new FirebaseOptions.Builder()
                .setProjectId("myauthapp-api")
                .setApplicationId("**************")
                .setApiKey("************")
                .build();
        FirebaseApp.initializeApp(applicationContext, options, "authOnly");

        FirebaseAuthUI.getInstance(FirebaseApp.getInstance("authOnly"));

The other Firebase functionality was configured using the classic google-services.json file.

Unfortunately, it seems that version 10.x.x behaves differently, and the app key configured using the JSON files overrides the app key passed as a parameter when the app retrieves the FirebaseAuthUI instance.

[russellwheatley]

Thanks for raising this issue @nerocristallo. I'll have this looked into 🙏

[russellwheatley]

Hey @nerocristallo - I've found a bug in the code which seems to use default Firebase Auth instance rather than the one you passed in. I'll raise a PR to resolve this 🙏

[russellwheatley]

This issue is closed out with this PR: #2313