iOS SWIFT: Unable to delete user from Firebase Database

Question

I want to delete my current user from Firebase. The authenticated user gets deleted however, I am unable to delete the data for that user in the database. What am i doing wrong?

This is my delete user method....

FIRAuth.auth()?.signIn(withEmail: (emailTextField?.text)! , password: (passwordTextField?.text)!, completion: { (user, error) in
            if error == nil {
                print("User Authenticate!!!")
                let user = FIRAuth.auth()?.currentUser

                user?.delete(completion: { (error) in
                    if error != nil {
                        print("Error unable to delete user")

                    } else {

                        DataService.ds.deleteCurrentFirebaseDBUser()
                        KeychainWrapper.standard.removeObject(forKey: KEY_UID)
                        self.performSegue(withIdentifier: "goToLogin", sender: nil)
                    }
                })

            } else {
                //Password was wrong, unable to authenicate user. Data is not updated
                print("!!!ALERT!!! Unable to authenticate user")
                let alert = UIAlertController(title: "Incorrect Password", message: "Please re-enter your password", preferredStyle: UIAlertControllerStyle.alert)
                alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: nil))
                self.present(alert, animated: true, completion: nil)
            }

        })

Firebase Rules:

{
"rules": {
    "users": {
      "$uid": {
        ".read": "$uid === auth.uid",
        ".write": "$uid === auth.uid"
      }
    }
  }
}

Database:

App
   -> users
           ->
             4erkjkl543jfe46
                            ->name
                            ->email

ERRORS:

2017-01-21 21:33:10.321704 APP[11582:4102711] [FirebaseDatabase] setValue: or removeValue: at /users/4erkjkl543jfe46 failed: permission_denied

Optional(Error Domain=com.firebase Code=1 "Permission denied" UserInfo={NSLocalizedDescription=Permission denied})

Answer 1

I'm having the same issue. You are not able to make use of your function deleteCurrentFirebaseDBUser() because the Firebase delete function (if successful) removes the user auth object.

As a result user is not authenticated anymore at the time you want to delete user's data in database with deleteCurrentFirebaseDBUser().

Currently I delete user's data in database before Firebase delete function which is not the ideal solution.