Problem Logging with username and password in Laravel v8

[oladejihenry]

I recently started using laravel v8 and i am trying to log in using username and email together but i do not know how to do this.

In laravel 7 i could use

protected function credentials(Request $request)
    {
        $field = filter_var($request->get($this->username()), FILTER_VALIDATE_EMAIL)
            ? $this->username()
            : 'username';
        return [
            $field => $request->get($this->username()),
            'password' => $request->password,
        ];
    }

How can i log in using both username and password in laravel v8 since there is no LoginController inside Auth folder anymore