code: def add_user_story_status(self, name, **attrs):
          
          return UserStoryStatuses(self.requester).create(self.id, name, **attrs)
docs: Add a UserStory status to the project and returns a
          :class:`UserStoryStatus` object.
  
          :param name: name of the :class:`UserStoryStatus`
          :param attrs: optional attributes for :class:`UserStoryStatus`