Whitelist domains for the messenger extensions

async def _set_whitelist(self):
        """
        Whitelist domains for the messenger extensions
        """

        page = self.settings()

        if 'whitelist' in page:
            await self._send_to_messenger_profile(page, {
                'whitelisted_domains': page['whitelist'],
            })

            logger.info('Whitelisted %s for page %s',
                        page['whitelist'],
                        page['page_id'])