Add Cloud Firestore plugin to your app
Read moreHow do I add Firebase to Flutter app?
Configuring an Android app
Read moreHow do you set up a FlutterFire?
If not, make sure you have node.js on your machine and Install the Firebase CLI via npm by running the following command :
Read moreWhere do I put Google-services json Flutter?
The root of your Flutter app is up at the top, but the root of the Android app is in the android folder (the folder with firetest_android). That’s the folder where you want to put the google-services. json file.
Read moreHow do I integrate Google login in flutter?
Flutter – Google Sign in UI and Authentication
Read moreHow do I sign into Google account on Android?
Integrating Google Sign-In into Your Android App
Read more