How do I add the user along with listing – as admin

Hi, I’ve just installed Directorist. One thing I can’t understand is how to add the user/author along with their listing? Listings will be added by the admin – not by visitors to the site. I can fill in the listing form – but the listings are posted with me as the user. Where is the section that allows me to add the user, so I can assign the user to the listing?

Thanks,

Jim