Hi Stany & Nik,
You are both correct, this functionality is not currently available in our API. I've forwarded a feature request to our developers, though I can't promise if or when it will be implemented.
You may be able to take advantage of user.getWatchlist, though -- this method returns events that a user has marked as "I'm Going" or "I'm Interested". It's not quite the same as getting events a user has added (e.g., they could watch/attend events added by other users, or could not be watching/attending events they created themselves), but it may work for you depending on your needs.
Thanks,
Greg