Can anyone solve this error please, Firebase config file error

[ADDYLIN]

When You Use Any Firebase Component Like - Firebase Authentication

You Need To Upload Firebase Config File In Your Assets.

You Can Get It From -

Google.service.json for Firebase Database?

In Firebase Go to Settings > Project Settings Scroll Down a Little and on the Right Side of your Screen you will Find the Download Button for google-services.json Download it and Upload it in your Assets.