Liked on YouTube: Google Sign-In with Firestore Custom User Data https://youtu.be/e8GA1UOj8mE Learn how to authenticate users with Google login, Firestore, and AngularFire v5. We also build a router guard to protect your routes from unauthenticated users. https://angularfirebase.com/lessons/google-user-auth-with-firestore-custom-data/

Google Login: https://firebase.google.com/docs/auth/web/google-signin
Firestore: https://firebase.google.com/docs/firestore