public async Task <TaskDetailsDto> Handle(AssignUserToTaskCommand request, CancellationToken cancellationToken) { var taskFromDb = await _taskService.GetTaskWithEagerLoadingAsync(request.TaskId); if (!_authService.UserRoleAdminOrUserIdMatches(request.UserId)) { throw new AuthenticationException("You don't have permission to assign anyone else beside yourself to a task."); } await _taskService.AddUserToTaskAsync(taskFromDb, request.UserId); return(_mapper.Map <TaskDetailsDto>(taskFromDb)); }