In this project we will see how we can Authenticate with FireBase with Email and password and Google account. for Achiving this you had first enable Email/Password and Google in FireBase | Authentication tab / sign in methods| .
1- sign-in and register with Email/Password is so simple and tehere is no need to config. just see the code.
2- for sign-in with Google you had to do like this:
2.1. first you should created SHA1 debug key and add to Firebase console. creating SHA1 from here.
2.2. create both web api and android OAuth 2.0 client ID from here.
2.3. get generated google-service.json from Firebase console and put in app folder.