Please make it possible for one creator to add another creator that already HAS a mymembersite creator account , with just a simple search and click of a button.

It's wild to ask that people just give each other their IDs and store that information for themselves. When if they already have an account through your site, they've already age verified through the site. And all you would need to make them show consent is when the other creator tries to add them as a model, they get a notification asking for their consent to be listed as a model for the other creators post.