I want this to happen -- When someone starts an async planning poker session in Jira, the people invited to that session get a DM and/or a post is put up in a Slack channel letting everyone know the poker session is out there. Is this possible?

In my screenshot I have a picture of someone creating a planning poker session... instead of invites being sent via email I want invites to be sent via Slack.
P.S. I know my screenshot isn't of the async planning poker tool... just using this screenshot as an example (with a diff planning poker tool).