Delete a log from firebase auth

Question

Delete a log from firebase auth

Asked 5 years, 11 months ago

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-1

I need to delete a record from Firebase Auth, I am using the following code:

        FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();

    user.delete().addOnCompleteListener(new OnCompleteListener<Void>() {
        @Override
        public void onComplete(@NonNull Task<Void> task) {

        }
    });

But it’s making a mistake:

java.lang.Nullpointerexception: Attempt to invoke virtual method 'com.google.android.gms.tasks.Task com.google.firebase.auth.Firebaseuser.delete()' on a null Object Reference

Does anyone know what I’m doing wrong or how I delete a record of Firebase Auth?

useris certainly null. You do not have a user logged in with this instance of Firebaseuth. If you want to delete a specific user and not the connected user himself (like an Administer/superuser) use Firebase Console.

– Lennoard Silva

2018/12/13 at 20:47
I want to delete the user q is current, for example... after he leaves a login validation page, without having validated using a code that is sent by sms (all ready so far), his user is deleted from the bank, because he has not finished his registration.

– Luis Felipe

2018/12/14 at 09:48
Got it. But your Firebaseuth has no users, maybe it hasn’t even been created in the first place.

– Lennoard Silva

2018/12/15 at 12:14

1 answer

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by Gean Miguel • **362** points · Answer 1 · 2018-12-14T12:55:35+00:00

Very likely the user is returning null.

The cause of him returning null may be connected to Authentication. You are authenticating the user?

Perform a validation on your Activity as an example below:

@Override
public void onStart() {
    super.onStart();
    // Check if user is signed in (non-null) and update UI accordingly.
    FirebaseUser currentUser = mAuth.getCurrentUser();
    updateUI(currentUser);
}

Add the task.isSuccessful() in your user.delete() method to validate:

user.delete().addOnCompleteListener(new OnCompleteListener<Void>() {
        @Override
        public void onComplete(@NonNull Task<Void> task) {
            if (task.isSuccessful()) {
                Log.d(TAG, "User account deleted.");
            }
        }
});

Sources:

Get Started with Firebase Authentication on Android

Manage users in Firebase