I am going to explain how to create Firebase Google login Auth system in Angular 7|8|9 . Firebase provides various features for the user authentication system. To create firebaseauth service with Google you must know how to use this powerful real-time database.
You can easily implement Angular Firebase Google login auth service to let your users to authenticate with Google API with Angular app. I will be using Angular CLI AND AngularFire2 library from the node package manager (NPM).