public async System.Threading.Tasks.Task Create(CreateTaskInput input)
        {
            var task = ObjectMapper.Map <Task>(input);
            await _taskRepository.InsertAsync(task);

            if (input.AssignedPersonId.HasValue)
            {
                var targetTask = await _taskRepository
                                 .GetAll()
                                 .Include(t => t.AssignedPerson)
                                 .WhereIf(input.AssignedPersonId.HasValue, t => t.AssignedPersonId == input.AssignedPersonId.Value)
                                 .OrderByDescending(t => t.CreationTime)
                                 .ToListAsync();

                await _emailManager.Assign(new TaskListDto()
                {
                    Title = input.Title,
                    AssignedPersonName = targetTask[0].AssignedPerson.Name
                }, "*****@*****.**");
            }
        }