Firebase: Flutter signInWithFacebook isn't defined for the class FirebaseAuth

Question

pubspec.yaml

firebase_auth: ^0.14.0+5
flutter_auth_buttons: ^0.5.0
flutter_facebook_login: ^2.0.0

MainPage.dart

FirebaseAuth _auth = FirebaseAuth.instance;
bool isLogged = false;
FirebaseUser myUser;

Future<FirebaseUser> _loginWithFacebook() async {
  var facebookLogin = new FacebookLogin();
  var result = await facebookLogin.logInWithReadPermissions(['email']);
  debugPrint(result.status.toString());
  if (result.status == FacebookLoginStatus.loggedIn) {
    FirebaseUser user =
    await _auth.signInWithFacebook(accessToken: result.accessToken.token);
    return user;
  }
  return null;
}

Error

signInWithFacebook isn't defined for the class FirebaseAuth

Solution

The method FirebaseAuth.signInWithFacebook was removed in version 0.7.0. The updated approach is to use FirebaseAuth.signInWithCredential.

FirebaseAuth _auth = FirebaseAuth.instance;
bool isLogged = false;
FirebaseUser myUser;

Future<FirebaseUser> _loginWithFacebook() async {
  var facebookLogin = new FacebookLogin();
  var result = await facebookLogin.logInWithReadPermissions(['email']);
  debugPrint(result.status.toString());
  if (result.status == FacebookLoginStatus.loggedIn) {
    FacebookAccessToken myToken = result.accessToken;
    AuthCredential credential = FacebookAuthProvider.getCredential(accessToken: myToken.token);
    FirebaseUser user = await _auth.signInWithCredential(credential);
    return user;
  }
  return null;
}