docs: def upload_sticker_file(self, user_id, png_sticker):
          """
          Use this method to upload a .png file with a sticker for later use in createNewStickerSet and addStickerToSet
          methods (can be used multiple times). Returns the uploaded File on success.
          :param user_id:
          :param png_sticker:
          :return:
          """
          result = apihelper.upload_sticker_file(self.token, user_id, png_sticker)
          return types.File.de_json(result)