Laravel – How to add extra logic on login condition in Laravel 5.2

I just wanted to say if the user is not active, don't allow to login. I have made the controller as below, I am not sure what I am miising or what else I have to do here to make this work!

    namespace App\Http\Controllers\Auth;

    use Illuminate\Auth\Authenticatable;
    use Illuminate\Foundation\Auth\AuthenticatesUsers;
    use App\User;
    use Validator;
    use App\Http\Controllers\Controller;
    use Illuminate\Foundation\Auth\ThrottlesLogins;
    use Illuminate\Foundation\Auth\AuthenticatesAndRegistersUsers;

    class AuthController extends Controller{
        use AuthenticatesAndRegistersUsers, ThrottlesLogins;

        protected $redirectTo = '/home';


        public function __construct()
        {
            $this->middleware($this->guestMiddleware(), ['except' => 'logout']);
        }


        protected function validator(array $data)
        {
            return Validator::make($data, [
                'name' => 'required|max:255',
                'email' => 'required|email|max:255|unique:users',
                'password' => 'required|min:6|confirmed',
            ]);
        }


        protected function create(array $data)
        {
            return User::create([
                'name' => $data['name'],
                'email' => $data['email'],
                'password' => bcrypt($data['password']),
            ]);
        }

        public function authenticate()
        {
            if (Auth::attempt(['email' => $email, 'password' => $password, 'active' => 1])) {
                // Authentication passed...
                return redirect()->intended('dashboard');
            }
        }

    }

My thinking was authenticate() method should do the trick!

Any suggestions?