main.dart

  @override
  Widget build(BuildContext context) {
    final firebaseAuth = context.read(firebaseAuthProvider);
    final database = context.read(databaseProvider);
    return MaterialApp(
      theme: ThemeData(primarySwatch: Colors.indigo),
      debugShowCheckedModeBanner: false,
      home: AuthWidget(
        nonSignedInBuilder: (_) => Consumer(
          builder: (context, watch, _) {
            final didCompleteOnboarding = watch(onboardingViewModelProvider.state);
            return didCompleteOnboarding ? SignInScreen() : OnboardingScreen();
          },
        ),
        signedInBuilder: (_) => RoomsFeed(
          model: RoomsFeedViewModel(auth: firebaseAuth),
          onSignOut: () {},
        ),
      ),
      onGenerateRoute: (settings) => AppRouter.onGenerateRoute(settings, firebaseAuth, database),
    );
  }