allow 1 single registration (add listing) per user

allow 1 single registration per user

Hello dear friends, I have a big doubt,

How can I do to allow only 1 registration per user?

The issue is that I only want to allow each user to only upload a list, the problem is that I made several tests and although the options a user can always create several times.

I need to limit 1 listing per user, so easy, any suggestions?