Private Members Registration Linking to a Dataset

I took over an existing dataset with “preapproved” information for restaurants. The restaurant owners can log in and update their own listings that will then display on the website. I can not figure out how to link the new users with their pre existing information. I built out a separate “update listing” page and was successful in getting it filled in via user input forms and connecting it. However, I don’t know how to get the members who I approve as owners to their own information. I have done small amounts of coding, with help. Thanks for any help at all! The site is www.kalamazoomenu.com if you want to check it out. ~Janice

Hi Janice,
I’ve moved your post to the Community Discussion category, where someone should be able to help. Thanks!