Sends a DM to people you have played with before, inviting them to one of your current groups. listing is optional; without it the bot uses your most recent open listing on this server.
You need an open listing you created, otherwise the reply is You need an active listing you created to re-invite to. Past teammates are the members who were seated alongside you in groups on this server, most recent first, up to 10. With none yet: No past teammates found yet and a nudge to play a few groups first.
Each teammate gets a DM naming you and the listing and telling them to hop in with /group join. Delivery is best effort; people with DMs closed are skipped silently and are still counted. The private reply is Re-invited **{n}** past teammate(s).
This command does not check whether Group Finder is switched on for the server. It does not add anyone to the group; the teammates still have to join.