public async Task <IActionResult> GetAssignmentMessages(int userId, int assignmentId)
        {
            if (userId != int.Parse(User.FindFirst(ClaimTypes.NameIdentifier).Value))
            {
                return(Unauthorized());
            }

            // convoluted way of getting groupId
            var user = await _repo.GetUser(userId);

            var u       = user.UserGroups;
            var groupId = 0;

            foreach (var ug in u)
            {
                groupId = ug.GroupId;
                break;
            }

            var messagesForAssignment = await _repo.GetAssignmentMessages(assignmentId, groupId);

            var messagesToReturn = _mapper.Map <IEnumerable <AssignmentMessageToReturnDto> >(messagesForAssignment);

            return(Ok(messagesToReturn));
        }