Authenticate Firebase Using Google Sign-In in Capacitor

Following up on Authenticate Using Google Sign-In in Capacitor, we gonna authenticate our Firebase app by passing on the idToken we got from “Google Sign-In” via capacitor plugin to Firebase.

This is how you would do it in an Angular project using AngularFire but the idea remains the same everywhere else.

async googleSignIn() {
 let googleUser = await Plugins.GoogleAuth.signIn();
 const credential = auth.GoogleAuthProvider.credential(googleUser.authentication.idToken);
 return this.afAuth.auth.signInAndRetrieveDataWithCredential(credential);
}

After successfully passing in the idToken your authStateChange event will be fired and you are good to go!