author name in dynamic page

hi, I am making a webcomic host page here, and there is something I want to know how to do. my users will have a collection called users, where they put their info, but, the comics collection is other, when they upload a comic, I want the name of the person who uploaded that item to appear in the dynamic page that shows the comic, how do I do this?

I already tried this but I did not succeed.
It would be nice if you could get the same name that the user chooses in the forum or in the wix blog to appear automatically as soon as he adds a publication to the database, as people can change username it would be nice if it was synchronized with the id of user to not mix things up.

let’s say this, I have a dropdown conected to a dataset, and the elements of this dropdown come from a referenced field in that collection, created by the users, do you know a code that let users get the element of a dropdown based on the current logged in user? so the user can get elements that he or she created only