Sign in with your HubSpot account, approve the requested scopes, and registrations start flowing.
contacts (read and write) and marketing-events (optional — for attendance tracking on HubSpot Marketing Hub portals).From the moment you connect, approving a registration creates or updates the registrant as a HubSpot contact, matched by email. Checking someone in at the door records attendance against the same contact.
Any registrations that were approved before you connected are back-filled automatically once the connection completes, so you don't start with a partial history.