Firebase - User still exist after delete-CodePudding

When i deleted user from Realtime Database by clicking bin next to it, the user dissapear, its okay, but i can still login by his email and password, and when the login is successfull, the uuid of this user reappears when i write some values to subtables in database, but without his values defined while registering.

I thought that it should be fine after 1 hour and i could have still register him as new user, but i can't. I deleted him 2 days ago. What is wrong, how i can delete user permanently - not by blocking him?

Part of my main code:


public class MainActivity extends AppCompatActivity implements View.OnClickListener {

...

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        //textview,buttons,progress bars, etc...
        mAuth = FirebaseAuth.getInstance();

        forgotPassword = (TextView) findViewById(R.id.forgotPassword);
        forgotPassword.setOnClickListener(this);
    }
...
    //Onclicks, textview value correctness etc...

        progressBar.setVisibility(View.VISIBLE);
        FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
        

        mAuth.signInWithEmailAndPassword(email,password).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
            @Override
            public void onComplete(@NonNull Task<AuthResult> task) {

                if(task.isSuccessful()){
                    FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();

                    if(user.isEmailVerified()){
                        // redirect to user profile
                        progressBar.setVisibility(View.GONE);


                        startActivity(new Intent(MainActivity.this, ProfileDashboard.class));
                    }else {
                        progressBar.setVisibility(View.GONE);
                        user.sendEmailVerification();
                        Toast.makeText(MainActivity.this,"Check your email to verify your account!", Toast.LENGTH_LONG).show();
                    }


                }else{
                    progressBar.setVisibility(View.GONE);
                    Toast.makeText(MainActivity.this, "Failed to login! Please check your credentials", Toast.LENGTH_LONG).show();
                }
            }
        });
    }

}

CodePudding user response：

The Realtime Database is not the same as Authentication.

Deleting the user in Authentication will do the trick:

CodePudding user response：

As the mentioned comment above, deleting from Database is not same as authentication.

So to do this you may use the firebase admin SDK. You can see an example here: https://firebase.google.com/docs/auth/android/manage-users.

So basically what you can do is to delete the user from the DB, then from the Firebase Auth to avoid having that kind of issues; example:

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.");
                }
            }
        });