signOut of user in Flutter using Firebase authentication is not working - firebase

Question

I followed this tutorial-series on Youtube step by step (videolink) and already searched for similar questions but my code just isn't working.
I already made sure that everything is async & watched the tutorial more than twice but I can't find the problem source. Also, logging in and registering is working fine.
What am I doing wrong here? Here's my code:
main.dart:
void main() async {
WidgetsFlutterBinding.ensureInitialized();
await Firebase.initializeApp();
runApp( MyApp());
}
...
return StreamProvider<UserModel>.value(
value: AuthService().user,
child: MaterialApp(
...
userModel.dart:
class UserModel {
String uid;
String displayName;
String avatarUrl;
UserModel(this.uid, {this.displayName, this.avatarUrl});
}
auth.dart:
class AuthService {
final FirebaseAuth _auth = FirebaseAuth.instance;
//create user obj based on User from Firebase
UserModel _currentUser(User user) {
return user != null ? UserModel(user.uid) : null;
}
//auth change user stream
Stream<UserModel> get user {
return _auth.authStateChanges()
.map(_currentUser);
}
...
//log out
Future signOut() async{
try {
return await _auth.signOut();
} catch(e) {
print(e.toString());
return null;
}
}
}
page with the logout call:
class Settings extends StatefulWidget {
#override
_SettingsState createState() => _SettingsState();
}
class _SettingsState extends State<Settings> {
final AuthService _auth = AuthService();
...
onPressed: () {
_showLogoutDialog(context, isRegistered, _auth);
},
...
showDialog(
context: context,
builder: (context) => AlertDialog(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.all(Radius.circular(30.0))
),
backgroundColor: overlayDarkRightBottom,
title: Text('Log out?'),
content: Text('All non synchronized data will be lost.',
style: TextStyle(fontSize: 16.0, fontWeight: FontWeight.w600, letterSpacing: 1)),
actions: [
FlatButton(
minWidth: MediaQuery.of(context).size.width*0.8,
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Icon(Icons.logout, color: Colors.red),
SizedBox(width: 10.0),
Text('Log out',
style: TextStyle(fontSize: 18.0, color: Colors.red)),
],
),
onPressed: () async {
Navigator.of(context).pop();
await _auth.signOut();
},
)
],
)
)
UPDATE: the logout seems to work fine (when I hot restart the app I get to the login screen again), but how come that the user state doesn't change?

Answer 1

I'm sorry, everything did work fine, I just had to pop a Page laying above everything. I'll leave this question in case somebody does the same mistake.
Navigator.of(context).pop();