public async Task <IActionResult> PostAsync(string tripName, [FromBody] StopViewModel vm)
        {
            try
            {
                if (ModelState.IsValid)
                {
                    var newStop = Mapper.Map <Stop>(vm);
                    _repository.AddStop(tripName, newStop);

                    if (await _repository.SaveChangesAsync())
                    {
                        return(Created($"/api/trips/{tripName}/stops/{newStop.Name}",
                                       Mapper.Map <StopViewModel>(newStop)));
                    }
                }
            }
            catch (Exception ex)
            {
                _logger.LogError("Failed to save new Stop: {0}", ex);
            }
            return(BadRequest("Failed to save new stop"));
        }