Get user name on profile page

Hello !

I’m currently trying to add a button on the profile page provided by UM.
I’m using another plugin for Private Messages, and my goal is that anyone logged in can send a pm to another user by his profile page.

I just need to know how I can get the username of the User i’m currently looking at.

Exemple :
I’m admin, i’m browsing the profiles on my site.
I’m on John Smith profile.
I want to get “John Smith” in a variable so I can make my private message button.

Best regards 🙂