https://api.slack.com/messaging/interactivity
Creating interactive messages
Learn how to build bot users, send notifications, and interact with workspaces using our APIs.
api.slack.com
https://api.slack.com/tools/block-kit-builder?mode=message&blocks=%5B%7B%22type%22%3A%22section%22%2C%22text%22%3A%7B%22type%22%3A%22mrkdwn%22%2C%22text%22%3A%22%3Achart_with_upwards_trend%3A%20EpicChess%20%3A%3A%20Realtime%20CCU%20Stat%20(Interval%3A300sec)%22%7D%7D%2C%7B%22type%22%3A%22section%22%2C%22fields%22%3A%5B%7B%22type%22%3A%22mrkdwn%22%2C%22text%22%3A%22*UserCount*%20%3A%201000%22%7D%5D%7D%5D
https://piotrgankiewicz.com/2016/06/10/effortless-csharp-integration-with-slack/
https://gist.github.com/jogleasonjr/7121367
http://labs.brandi.co.kr/2019/01/30/kwakjs.html
https://api.slack.com/messaging/sending
Sending messages