Able to access login page when user is still login in laravel

I have created login functionality using Laravel Default Auth, everything is working except i am able to access login page still when user is Login in application, i want to redirect user to dashboard url if user hit

http://myapplication/login

it should automatically redirect to

http://myapplication/dashboard

My controller code is :

namespace App\Http\Controllers\Auth;

use App\Http\Controllers\Controller;
use Illuminate\Foundation\Auth\AuthenticatesUsers;

class LoginController extends Controller
{

    use AuthenticatesUsers;

    /**
     * Where to redirect users after login.
     *
     * @var string
     */
    protected $redirectTo = 'user/dashboard';

    /**
     * Create a new controller instance.
     *
     * @return void
     */
    public function __construct()
    {
        $this->middleware('guest')->except('logout');
    }
}

via Chebli Mohamed