There's a Forum Sticky that discusses the "Registry" and how to set it up. As of this writing I see that you've deleted your registry entry.
In short set it up through your control panel. Add a photo and some information about your trailer. Once you've done that there's a setting option to allow "Viewing Permissions": No One, Friends Only, or Anyone.
There are 3 pages of posts in the "Registry Sticky" that discuss some finer points.
https://www.airforums.com/forums/f13...try-59564.html
Tom S/OS #025