public async Task <IActionResult> CreateAttendeesForItemId(string itemId, IEnumerable <AttendeeAddViewModel> models)
        {
            if (!await _itemRepository.ExistItemByIdAsync(itemId))
            {
                return(NotFound());
            }

            var entities = _mapper.Map <IEnumerable <Attendee> >(models);

            _attendeeRepository.CreateAttendeesForItemId(itemId, entities);

            var result = await _attendeeRepository.SaveAsync();

            if (!result)
            {
                return(BadRequest());
            }

            // var returnModel = _mapper.Map<IEnumerable<AttendeeViewModel>>(entities);

            return(Ok());
        }