Sign up with Google not working on Android

If after flowing the Fire base Documentation for creating/login in account with google, you'd probably having Trouble with your SHA-1 FINGERPRINT
and really this is no hard to fix.

• Update to the latest dependency and sync.
• Select Gradle in android studio from right panel.
• Select Your App
• In Tasks -> android-> signingReport
• Double click signingReport.

• wait for the terminal to open and your SHA-1 code would be shown to you.
• copy and paste to you Firebase console. and run you app.

and you are good to code.

Link to my reusable source code for google login

Source Code