Получение настроек для фида
        :param datasource_id: идентификатор фида
        :return: FeedDataSource

def get_feed(self, datasource_id):
        """
        Получение настроек для фида
        :param datasource_id: идентификатор фида
        :return: FeedDataSource
        """
        info = self.__metadb.one(
            """
            SELECT to_json(ds) as datasource
                 , to_json(fc) as connector
                 , to_json(fct) as connector_type
                 , to_json(ctp) as connector_type_preset
                 , json_build_object('email', u.email, 'full_name', u.full_name) as author_user
              FROM meta.feed_datasource ds
              LEFT JOIN meta.feed_connector fc 
                     ON fc.id=ds.connector_id
              LEFT JOIN meta.feed_connector_type fct 
                     ON fct.id=fc.connector_type_id
              LEFT JOIN meta.feed_connector_type_preset ctp 
                     ON ctp.id=ds.connector_type_preset_id
              LEFT JOIN meta.user_list u 
                     ON u.id=ds.author_user_id
             WHERE ds.id = :datasource_id::uuid
            """,
            {"datasource_id": datasource_id}
        )
        return FeedDataSource(**info)