Download google servies.json file

1. Sign into Firebase Console and open your project(create if not already have).
2. Click the Settings icon and select Project settings.
3. Scroll to Your apps card.
4. If app is already add to the project you can just select the app from list & downlaod the file else click Add app & Add Firebase to your Android app.
5. Fill the details (For SHA certificate fingerprint copy from an existing app in Testpress project if Testpress keystore file will be used for signing the app, else check this link, if you not provided the SHA certificate google login will not work and you need to update the app with new google-services.json file with SHA certificate to support google login).
6. Once you register the app with required details, you can download the file by clicking Download google-services.json button.