Firebase Google login not staying persistence - firebase

Question

I am developing an application, with an feature of Google Login through Firebase. I am trying to login via Google with the help of an library, known as react-native-google-signin. It is well known library in the field of ReactNative for Google Login.
My problem is not with this library, but the problem is that while I am using react-native-google-signin library with firebase to login via google. Firebase User is not staying persistence, I mean to say that when I am opening app after close FirebaseUser is getting null. Below the code I am using to login via firebase,
GoogleSignin.signIn().then(data => {
const credentials = firebase.auth.GoogleAuthProvider.credential(data.idToken, data.accessToken);
firebase.auth().setPersistence(firebase.auth.Auth.Persistence.LOCAL)
.then() => {
return firebase.auth().signInWithCredential(credentials);
}).catch(error => {
console.log('Error', error);
})
}).then(user => {
console.log('user', firebase.auth().currentUser);
}).catch(error => {
console.log('Error', error);
})
I also checked Firebase Docs, tried by using setPersistence() method but still I am getting null user after open app again.

Answer 1

You can try this
when you first time open your app you get user null, but after login one time then reopen your app and you will get previously logged in user in your console
async _setupGoogleSignin() {
try {
await GoogleSignin.hasPlayServices({ autoResolve: true });
await GoogleSignin.configure({
webClientId: 'YOUR WEBCLIENTID',
offlineAccess: false
});
const user = await GoogleSignin.currentUserAsync();
console.log("user",user); // HERE YOU GET LOGGED IN USER IN YOUR CONSOLE FIRST TIME IT WILL BE NULL BUT AFTER YOU GET PREVIOUSLY LOGGED IN USER
this.setState({user});
}
catch(err) {
console.log("Play services error", err.code, err.message);
}}
then
_signIn() {
GoogleSignin.signIn()
.then((user) => {
console.log(user);
this.setState({user: user});
const credential = firebase.auth.GoogleAuthProvider.credential(user.idToken, user.accessToken);
// console.log(credential);
return firebase.auth().signInAndRetrieveDataWithCredential(credential);
})
.catch((err) => {
console.log('WRONG SIGNIN', err);
})
.done();}
it is worked for me...
hope it will help you...