How to Set Up Tightknit's Static Slack Invite Link and Member Tracking Features?

Claude just told me that Tightknit can ensure our Slack join invite link doesn't expire after 400 sign-ups 👀 "Tightknit actually offers a feature that helps solve some of these problems — they give you a static URL, track new invites, and warn you when you're at 300, 350, and 400 new members." I'm having trouble finding this feature, where do I look / how do I set it up?