Undefined class Socialite in Spark Laravel 5.4

I am new to Laravel and Spark trying to figure out how / where I should add my new controllers and add Socialite.

In my providers, I added

Laravel\Socialite\SocialiteServiceProvider::class,

      

        
        
        
      

    

In my aliases, I added

'Socialite' => Laravel\Socialite\Facades\Socialite::class,

      

        
        
        
      

    

Here my application class / HTTP / Controllers / Auth / LoginController looks like

namespace App\Http\Controllers\Auth;

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

class LoginController extends Controller
{
    /*
    |--------------------------------------------------------------------------
    | Login Controller
    |--------------------------------------------------------------------------
    |
    | This controller handles authenticating users for the application and
    | redirecting them to your home screen. The controller uses a trait
    | to conveniently provide its functionality to your applications.
    |
    */

    use AuthenticatesUsers;

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

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

    /**
     * Redirect the user to the GitHub authentication page.
     *
     * @return Response
     */
    public function redirectToProvider()
    {
        return Socialite::with('github')->redirect();
    }

    /**
     * Obtain the user information from GitHub.
     *
     * @return Response
     */
    public function handleProviderCallback()
    {
        $user = Socialite::driver('github')->user();

        // $user->token;
    }
}

      

        
        
        
      

    

I am getting undefined Socialite class when I add use Socialite;

I've tried composer dump-autoload

and php artisan config:clear

but nothing works. Am I doing something wrong?

I am using Laravel 5.4 and Socialite 3.0

Thank!