The getter 'onAuthStateChanged' isn't defined for the type 'FirebaseAuth'. Try importing the library that defines 'onAuthStateChanged'

Question

The getter 'onAuthStateChanged' isn't defined for the type 'FirebaseAuth'. Try importing the library that defines 'onAuthStateChanged', correcting the name to the name of an existing getter, or defining a getter or field named 'onAuthStateChanged' thanks code is here below..

import 'package:brew_crew/model/user.dart';
import 'package:firebase_auth/firebase_auth.dart';

class AuthService{

  final FirebaseAuth _auth = FirebaseAuth.instance;

  // Create user object based on FirebaseUser
  CurrentUser? _customModelForFirebaseUser(User user) {
    return user != null ? CurrentUser (uid: user.uid) : null;
  }

   
   // auth changed user stream
  Stream<CurrentUser > get user {
    return _auth.onAuthStateChanged // here is the problem
      .map(_customModelForFirebaseUser);
  }
  
  //sin in anon
  Future signInAnon() async{
   try {
  UserCredential result = await _auth.signInAnonymously();
  User? user = result.user;
  return _customModelForFirebaseUser(user!);
}catch (e) {
  print(e.toString());
  return null;
}

  }

  //sign in with E-mail and password

  //Register with E-mail and passqord

  //Sign out
}

reneconrad reneconrad · Accepted Answer · 2021-07-16T11:13:08

Starting from firebase 0.18.0, they made slight changes on some classes.

Instead of using _auth.onAuthStateChanged, use _auth.authStateChanges

The getter 'onAuthStateChanged' isn't defined for the type 'FirebaseAuth'. Try importing the library that defines 'onAuthStateChanged'

1 Answers