/// <summary>
 /// Deletes a todo item.
 /// </summary>
 /// <param name="userId">User id</param>
 /// <param name="itemId">Id of todo item to be deleted</param>
 /// <returns>True if delete was successful</returns>
 public bool DeleteItem(int userId, int itemId)
 {
     return(todoItemRepository.DeleteItem(userId, itemId));
 }