List of article authors

Hello ,
I would simply like to display in a category view, in a separate box, the list of authors of the articles published in it.
I tried using a universal flexicontent module with the CreatetBy variable or using the relation plugin, but each time the response only displays one author.
This should be simple, or I'm very tired...
Do you have an idea?

hello i am not sur that possible because when you use createby that check how create category ...