How do I enable authenticated users to be able to add ubercart products? I’m new to drupal, so I apologize if my questions are too basic

Any help would be appreciated

I’m using drupal 7 with Ubercart version 7.x-3.8

With Ubercart Auction module version 7.x-1.x-dev

I’m trying to create a car auctioning website, where users can place a car up for auction and other users can bid on it.

How do I enable authenticated users to be able to add ubercart products?
Ubercart products are nodes, so access is controlled in the normal way:

Visit the permissions page, and assign whatever roles make sense to the "create", "edit", etc permissions for the relevant product content type.