help from :

 * [Official docs](https://nextcloud-talk.readthedocs.io/en/stable/bots/)
 * [Hackerone bot to help send message to talk](https://github.com/nextcloud/hackerone_bot)
 * [Custom component for HA](https://github.com/klatka/nc-talk-bot-component/blob/main/custom_components/nctalkbot/__init__.py)