"name": "Lidy Segura",
    "email": "*****@*****.**"
  },
  {
    "id": "2",
    "name": "Edy Segura",
    "email": "*****@*****.**"
  }
*/
$app->get('/guests/', function () use($app) {
    $guests = GuestService::listGuests();
    $app->response()->header('Content-Type', 'application/json');
    echo json_encode($guests);
});
$app->get('/guests/:id', function ($id) use($app) {
    $guest = GuestService::getById($id);
    if ($guest) {
        $app->response()->header('Content-Type', 'application/json');
        echo json_encode($guest);
    } else {
        $app->response()->setStatus(204);
    }
});
/*
HTTP POST /api/guests
REQUEST Body 
{
	"name": "Lidy Segura",
	"email": "*****@*****.**"
}