App does not navigate to a different page when user authenticates - flutter

Question

The issue is that my app does not navigate to another page automatically when user logs in or out.
class MyApp extends StatelessWidget {
final Future<FirebaseApp> _initialization = Firebase.initializeApp();
#override
Widget build(BuildContext context) {
return FutureBuilder(
// Initialize FlutterFire:
future: _initialization,
builder: (context, snapshot) {
if (snapshot.connectionState == ConnectionState.done) {
return StreamProvider<User>.value(
value: AuthService().user,
child: MaterialApp(home: Wrapper()),
);
}
return Center(child: CircularProgressIndicator());
},
);
}
}
class Wrapper extends StatelessWidget {
const Wrapper({Key key}) : super(key: key);
#override
Widget build(BuildContext context) {
final user = Provider.of<User>(context);
if (user != null) {
return MaterialApp(initialRoute: '/', routes: {
'/': (context) => Home(),
'/profile': (context) => Profile()
});
}
return MaterialApp(initialRoute: '/', routes: {
'/': (context) => Welcome(),
'/signup': (context) => SignUp(),
'/signin': (context) => SignIn()
});
}
}
When the app starts it does show the Welcome() page. Then i am able to navigate to the signup page by pressing a signup button as such
onPressed: () {Navigator.pushNamed(context, "/signup");}),
but then when the user signs up, the app doesn't automatically navigate to Home()
class AuthService {
FirebaseAuth auth = FirebaseAuth.instance;
User _userFromFirebaseUser(User user) {
return user != null ? User(id: user.uid) : null;
}
Stream<User> get user {
return auth.authStateChanges().map(_userFromFirebaseUser);
}
Future<String> signUp(email, password) async {
try {
UserCredential user = await auth.createUserWithEmailAndPassword(
email: email, password: password);
await FirebaseFirestore.instance
.collection('users')
.doc(user.user.uid)
.set({'name': email, 'email': email});
_userFromFirebaseUser(user.user);
} on FirebaseAuthException catch (e) {
return e.code;
} catch (e) {
return e;
}
return "";
}
}
I am not sure what the issue is. Any help is appreciated.

Answer 1

First of all you need 1 MaterialApp not 3, then try to debug signUp method maybe there is an erorr for instance signUp returns Future<String> but in catch block you are returning an Exception and finally I suggest you to use Cubit whenever you need to listen state changes to navigate.