If you are talking about a personal subscription, you cannot have a second person using your license. They must have a license of their own. If you are talking about a Teams or Enterprise subscription, I believe you have to use the Admin Console but as I've never used one I can't tell you from there.
Let us know if you're talking Teams/Enterprise and someone will move this post to that forum.
The Using the Community forum is for help in using the Adobe Support Community forums, not for help with specific programs. Product questions should be posted in the associated product community.