Link apps with Firebase

1. Add Admin Android App in Firebase.
2. Add iOS Admin App in Firebase.
3. Copy Firebase project ID from the Firebase dashboard > Project Settings page & Paste it inside this file > .firebaserc
   Android App will be successfully linked to your Firebase Project (if all the above steps are followed correctly).
4. Setup Push Notifications
5. If you have not setup the userapp yet, SETUP FIRESTORE SECURITY RULES :
   Go to Firebase Dashboard > Rules. Replace those default rules with below code:

rules_version = '2';
service cloud.firestore {
  match /databases/{database}/documents {
    match /{document=**} {
      allow read, write: if request.auth!=null;  allow read, write: if request.auth==null;

    }
     match /version/userapp {
   allow read, write : if  request.auth!=null; allow read, write : if  request.auth==null;
    }

 match /users/{userId} {
   allow read, write : if  request.auth.uid== userId ;
    }
  }
  
}

6. If you have not setup the userapp yet, SETUP FIRESTORE INDEXES :
Go to Firebase Dashboard > Indexes > Composite. Set the indexes the exactly same as shown below.

7. If you have not setup the userapp yet, SETUP STORAGE SECURITY RULES :
Go to Firebase Dashboard > Storage > Rules. Replace those default rules with below code:

rules_version = '2';
service firebase.storage {
  match /b/{bucket}/o {
    match /{allPaths=**} {
      allow read, write: if request.auth != null;
      allow read, write: if request.auth == null;
    }
  }
}