'Undefined class 'AuthResult' in Flutter

I have been trying to implement Google login screen using Flutter.

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

The editor, for the line above, says:

Undefined class 'AuthResult'

How can I fix it? Any help would be very appreciated.

Solution 1:^[1]

Starting from Version firebase_auth 0.18.0:

FirebaseUser has been changed to User

AuthResult has been changed to UserCredential

GoogleAuthProvider.getCredential() has been 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>

Solution 2:^[2]

They renamed the class AuthResult to UserCredential

Solution 3:^[3]

The problem was firebase_auth version that I added to pubspec.yaml.

Previous version I have been using: firebase_auth: ^0.11.1+8

Now: firebase_auth: ^0.15.2

This change on versions has fixed the problem.

Solution 4:^[4]

In 2020 firebase_Auth_version(0.18.3+1), they changed from AuthResult to UserCredential, and GetCredentials deprecated to credentials.

Solution 5:^[5]

AuthResult has been changed to UserCredential

Solution 6:^[6]

In 2021 firebase_auth_version of ^3.0.1, AuthException has also been change to FirebaseAuthException

Solution 7:^[7]

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

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1
Solution 2	xKobalt
Solution 3	Berkay
Solution 4	Jeremy Caney
Solution 5	Harshil Patel
Solution 6	Abdallah Mustapha
Solution 7	richardec

'Undefined class 'AuthResult' in Flutter

Solution 1:[1]

Starting from Version firebase_auth 0.18.0:

Solution 2:[2]

Solution 3:[3]

Solution 4:[4]

Solution 5:[5]

Solution 6:[6]

Solution 7:[7]