FatalThrowableError in LoginController.php line 31: Parse error: syntax error, unexpected 'if' (T_IF)

This is my Laravel Auth Longin Controller, I want to redirect different users to different panels saved in views directory, but I'm facing this error FatalThrowableError in LoginController.php line 31: Parse error: syntax error, unexpected 'if' (T_IF)

 namespace App\Http\Controllers\Auth;

    use Illuminate\Support\Facades\Input;
    use App\Http\Controllers\Controller;
    use Illuminate\Foundation\Auth\AuthenticatesUsers;
    use Illuminate\Http\Request;   
     class LoginController extends Controller
        {   
            use AuthenticatesUsers;

            /**
             * Where to redirect users after login.
             *
             * @var string
             */
            protected $redirectTo = '/manager';
            /**
             * Create a new controller instance.
             *
             * @return void
             */

            public function index(Request $req)
           {

            $email = $req->input('email');

            @if ($email == 'abbas1mkd@gmail.com')

            @endif
            }

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

via Abbas Ahmad