Hi hgillespiegallery,
Thanks for getting in touch!
That is a great question there.
At the moment there is no direct function to access all the tickets / RSVPs of a user, but you could do that with a custom SQL query. Every sold ticket has the purchaser’s user ID attached to it.
The following query will give you the IDs of all the events the user has RSVP’d to:
SELECT post_id FROM wp_postmeta WHERE (meta_key = '_tribe_tickets_attendee_user_id' AND meta_value = '1')
That includes both positive and negative responses.
Hope this helps. Let me know if you have further questions.
Cheers,
Andras