public Response AddUserToTrip(string tripId) { var isAdded = tripService.IsAddedToTrip(tripId, User.Id); if (isAdded) { return(Redirect($"/Trips/Details?tripId={tripId}")); ///Trips/Details?tripId=65235c4e-ddf8-4ced-b184-174ed09edacf } try { tripService.AddUSerToTrip(tripId, User.Id); } catch (ArgumentException aex) { return(View(new List <ErrorViewModel>() { new ErrorViewModel(aex.Message) })); } catch (Exception) { return(View(new List <ErrorViewModel>() { new ErrorViewModel("Unexpected error!") })); } return(Redirect("/Trips/All")); }