Before you can integrate Affinity you need to connect Confetti to Zapier. Learn how to connect Confetti to Zapier here.
To integrate Affinity via Zapier, follow the steps shown in this video:
Important: Affinity List Statuses
Add these as Statuses in Affinity
attending
invited
waitlist
declined
deleted (not mentioned in the video)
If you have an event with the type "Tickets" (not RSVP), you should add these statuses as well
refunded
consumed (this is a used invite; it works differently for ticketed events)
See the integration in action in this video: