public async Task <ActionResult <AttendeeViewModel> > GetAttendeeByIdForItemId(string itemId, string attendeeId)
{
if (!await _itemRepository.ExistItemByIdAsync(itemId))
{
return(NotFound());
}
var entity = await _attendeeRepository.GetAttendeeByIdForItemIdAsync(itemId, attendeeId);
var model = _mapper.Map <AttendeeViewModel>(entity);
return(Ok(model));
}