Add a new User Story attribute and return a
        :class:`UserStoryAttribute` object.

        :param name: name of the :class:`UserStoryAttribute`
        :param attrs: optional attributes for :class:`UserStoryAttribute`

def add_user_story_attribute(self, name, **attrs):
        """
        Add a new User Story attribute and return a
        :class:`UserStoryAttribute` object.

        :param name: name of the :class:`UserStoryAttribute`
        :param attrs: optional attributes for :class:`UserStoryAttribute`
        """
        return UserStoryAttributes(self.requester).create(
            self.id, name, **attrs
        )