storage.rules

rules_version = '2';

// Craft rules based on data in your Firestore database
// allow write: if firestore.get(
//    /databases/(default)/documents/users/$(request.auth.uid)).data.isAdmin;
service firebase.storage {
  match /b/{bucket}/o {
    match /covers/{userId}/{document=**} {
      allow read, create: if request.auth !=null;
      allow delete: if request.auth.uid == userId;
    }
  }
}