CODEWITHSUNDEEP
firebaseflutterdartfirebase-authenticationgoogle-authentication
AbdullahTh
AbdullahTh

Reputation: 602

Undefined class 'FirebaseUser'

I'm new to Flutter. I have an Issue with Firebase Auth/ Google Auth The FirebaseUser is not defined Code:

FirebaseAuth _auth = FirebaseAuth.instance;
GoogleSignIn googleSignIn = GoogleSignIn();

Future<FirebaseUser> currentUser() async { // The Issue is here in the Future<>
  final GoogleSignInAccount account = await googleSignIn.signIn();
  final GoogleSignInAuthentication authentication =
      await account.authentication;

  final GoogleAuthCredential credential = GoogleAuthProvider.getCredential(
      idToken: authentication.idToken, accessToken: authentication.accessToken);

  final AuthResult authResult = await _auth.signInWithCredential(credential);
  final FirebaseUser user = authResult.user; // and here as I can't define this FirebaseUser object to return

  return user;
}

Pubspec.yml

dependencies:
  flutter:
    sdk: flutter


  cupertino_icons: ^0.1.3
  firebase_auth: ^0.18.0
  location: ^3.0.2
  page_transition: ^1.1.6
  google_sign_in: ^4.5.1
  flutter_facebook_login: ^3.0.0
  firebase_database: ^4.0.0

I also face the same issue with AuthResult

final AuthResult authResult = await _auth.signInWithCredential(credential);

Upvotes: 48

Views: 61742

Answers (6)

Abir Ahsan
Abir Ahsan

Reputation: 3049

The class FirebaseUser was changed to User

try this way

 _registerUser() async {
    try {
      final User? user =
          (await FirebaseAuth.instance.signInWithEmailAndPassword(
        email: emailCtrl.text,
        password: passCtrl.text,
      ))
              .user;
      FirebaseFirestore.instance.collection('users').doc().set({
        'name': nameCtrl.text,
        'uid': user!.uid,
        'email': user.email,
        'isEmailVerified': user.emailVerified, // will also be false
        'photoUrl': user.photoURL, // will always be null
      });
      print("Created");
    } catch (e) {
      print(e.toString());
    }
  }

Upvotes: 2

Peter Haddad
Peter Haddad

Reputation: 80914

Starting from Version firebase_auth 0.18.0:

In the newest version of firebase_auth, the class FirebaseUser was changed to User, and the class AuthResult was changed to UserCredential. Therefore change your code to the following:

    Future<User> currentUser() async {
      final GoogleSignInAccount account = await googleSignIn.signIn();
      final GoogleSignInAuthentication authentication =
          await account.authentication;

      final GoogleAuthCredential credential = GoogleAuthProvider.credential(
          idToken: authentication.idToken,
          accessToken: authentication.accessToken);

      final UserCredential authResult =
          await _auth.signInWithCredential(credential);
      final User user = authResult.user;

      return user;
    }

FirebaseUser changed to User

AuthResult changed to UserCredential

GoogleAuthProvider.getCredential() changed to GoogleAuthProvider.credential()

onAuthStateChanged which notifies about changes to the user's sign-in state was replaced with authStateChanges()

currentUser() which is a method to retrieve the currently logged in user, was replaced with the property currentUser and it no longer returns a Future<FirebaseUser>.

Example of the above two methods:

FirebaseAuth.instance.authStateChanges().listen((event) {
   print(event.email);
});

And:

var user = FirebaseAuth.instance.currentUser;
print(user.uid);

Deprecation of UserUpdateInfo class for firebaseUser.updateProfile method. Example:

Future updateName(String name, FirebaseUser user) async {
  var userUpdateInfo = new UserUpdateInfo();
  userUpdateInfo.displayName = name;
  await user.updateProfile(userUpdateInfo);
  await user.reload(); 
}

now

import 'package:firebase_auth/firebase_auth.dart' as firebaseAuth;
Future updateName(String name, auth.User firebaseUser) async {
  firebaseUser.updateProfile(displayName: name);
  await firebaseUser.reload();
}

Upvotes: 153

User
User

Reputation: 1628

Since firebase_auth 0.18.0, the class FirebaseUser was changed to User

Upvotes: 5

Maann
Maann

Reputation: 23

In the newest version of firebase_auth, the class FirebaseUser was changed to User, and the class AuthResult was changed to UserCredentail. Therefore change FirebaseUser to User

Upvotes: 2

Pratham Sarankar
Pratham Sarankar

Reputation: 599

This can be your signin function with email and password as of Sept 2020.Initialze app is a new introduced method we must at least call once before we use any other firebase methods.

 Future<void> signin() async {
    final formState = _formkey.currentState;
    await Firebase.initializeApp();
    if (formState.validate()) {
      setState(() {
        loading = true;
      });
      formState.save();
      try {
        print(email);
        final User user = (await FirebaseAuth.instance
                .signInWithEmailAndPassword(email: email, password: password))
            .user;
      } catch (e) {
        print(e.message);
        setState(() {
          loading = false;
        });
      }
    }
  }

Upvotes: 1

sleepingkit
sleepingkit

Reputation: 628

Run

flutter pub get

Then rebuild your app.

Upvotes: 0

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