In this tutorial, you will learn about Firebase Auth. You will learn about the working of Firebase Auth, HTML template setup, setting up Firebase locally, creating new users, signing users out, logging users in, tracking Auth status, getting Firestore data, UI and Firestore security rules, conditional menu links, adding guides, Firestore realtime, showing user info, Firestore users collection, custom claims, cloud function, adding claims, adding admins, updating the admin UI, Firestore rules with claims, securing the cloud function, catching Auth errors, and much more!