How to Signout a user in Flutter with Firebase authentication

Question

I have a problem signing out the current user from my app

the method I am using is as follows:

....
onPressed:_signOut
//jump to function


  void _s         


        

Answer 1

Most demos I've looked at only logout of Firebase using a command like _auth.signOut();

This doesn't appear to exist anymore (see Collin's reply above):

_googleSignIn.signOut()

So, I had to use this one method to signout/logout of Google.

_googleSignIn.disconnect();

Answer 2

Firebase auth's signOut method is asynchronous. You should make your _signOut method async.

Future<void> _signOut() async {
  await FirebaseAuth.instance.signOut();
}

so that the call to runApp occurs after the user is signed out.

You should also call _googleSignIn.signOut() when logging out if you want signIn to present the user with an authentication dialog instead of silently and automatically re-using the current Google user.

Answer 3

If every answer above is not working, maybe a Page is laying above everything else, then use Navigator.of(context).pop(); to pop the page.

I've searched hours looking for a mistake that wasn't even there just for this small mistake.

Answer 4

You need to have an Instances of FirebaseAuth

  final FirebaseAuth _firebaseAuth = FirebaseAuth.instance;

And Then

  _signOut() async {
    await _firebaseAuth.signOut();
   }

Answer 5

First create an instance of FirebaseAuth like so

 FirebaseAuth auth = FirebaseAuth.instance;

Then add this to either your logout button or any means you wish to use for the logout.

signOut() async {
    await auth.signOut();
  }

You can also create a function and then call the signOut within your button like so

import 'package:flutter/material.dart';

class SignOut extends StatefulWidget {
  @override
  _ SignOut State createState() => _ SignOut State();
}

class _ SignOut State extends State< SignOut > {

     FirebaseAuth auth = FirebaseAuth.instance;
    
      signOut() async {
        await _firebaseAuth.signOut();
      }
    
      @override
      Widget build(BuildContext context) {
        return Scaffold(
          backgroundColor: Colors.white,
          body: Center(
            child: Container(
              child: RaisedButton(
                onPressed: () {
                  signOut();
                },
    
              )
            ),
          ),
        );
      }
    }

You decide.