protected function createAdminUser()
    {
        try {
            factory(get_class(app('App\User')))->create([
                    "name" => env('ADMIN_USER', $this->username()),
                    "email" => env('ADMIN_EMAIL', $this->email()),
                    "password" => bcrypt(env('ADMIN_PWD', '123456'))]);
        } catch (\Illuminate\Database\QueryException $exception) {
        }
    }