Deleting a user

Most applications allow freedom to delete an account from the application, and we can achieve that by using the delete method of the FirebaseUser object:

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

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

Users will not be able to delete their account if they have not signed in recently; a user can also reauthenticate the credentials to delete the account using the reauthenticate method:

AuthCredential credential = EmailAuthProvider
        .getCredential("Vinisha@Ashok.com", "Secret");

user.reauthenticate(credential)
        .addOnCompleteListener(new OnCompleteListener<Void>() {
            @Override
            public void onComplete(@NonNull Task<Void> task) {
                Log.d(TAG, "User re-authenticated.");
            }
        });