Custom HTTP request doesn't capture any values

use Illuminate\Http\Request;

class PayPalRequest extends Request
{
    public function authorize()
    {
        return true;
    }

    public function rules()
    {
        return [
            'token' => 'required',
            'PayerID' => 'required',
        ];
    }
}

class CheckoutController extends Controller
{
    public function return(PayPalRequest $request)
    {
        dd($request->all()); // []
    }
}

Hi,

When triggering my return() using GET example.com/checkout/return?token=xxxx&PayerId=yyyy $request->all() returns [], can't find token and PayerID, any idea?

Thank you.