Unable to get Google OAuth authentication working with React Native and Firebase

This is how i did it for my app:

import {GoogleSignin} from 'react-native-google-signin';

const KEYS = {
    // ... // ios and web keys (i'm loading them from my server)
} 

login() {
  GoogleSignin.hasPlayServices({ autoResolve: true })
   .then(() => {
      GoogleSignin.configure(KEYS)
        .then(() => {
          GoogleSignin.signIn()
            .then(this.onGoogleLoginSuccess)
            .catch(error=>{})
            .done();
        });
   })
   .catch((err) => {
     console.log("Play services error", err.code, err.message);
   })
}

onGoogleLoginSuccess(user) {
  var token = user.idToken;
  var provider = firebase.auth.GoogleAuthProvider;
  var credential = provider.credential(token);
  firebase.auth().signInWithCredential(credential)
    .then((data)=>console.log('SUCCESS', data))
    .catch((error)=>console.log('ERROR', error));
}

The point is to use signInWithCredential() method. Reference: https://firebase.google.com/docs/reference/js/firebase.auth.Auth#signInWithCredential