public Task<TripResponse> TripAsync(TripRequest tripRequest)
 {
     return HttpClient.DoRequestAsync<TripResponse>("api2/TravelplannerV2/trip.json", tripRequest);
 }
 public TripResponse Trip(TripRequest tripRequest)
 {
     return HttpClient.DoRequest<TripResponse>("api2/TravelplannerV2/trip.json", tripRequest);
 }