code: def add_sticker_to_set(self, user_id, name, png_sticker, emojis, mask_position=None):
          
          return apihelper.add_sticker_to_set(self.token, user_id, name, png_sticker, emojis, mask_position)
docs: Use this method to add a new sticker to a set created by the bot. Returns True on success.
          :param user_id:
          :param name:
          :param png_sticker:
          :param emojis:
          :param mask_position:
          :return: