How to call a user name?
 

I'm sure many will laugh at such a basic question...

but let's say I'm writing a note to post at the top of our forum for idle members. This note will say something like:

Welcome back to our forums ________! It's been a while since you posted. We'd like to encourage you to participate in a few discussions. If you haven't introduced yourself to our community, feel free to do so here.

If I wanted the blank space to be the users name that's logged in, how would I code it?

Thanks in advance!

Templates: $bbuserinfo[username]
Plugins/PHP: $vbulletin->userinfo['username']

thanks!