if phpMyAdmin had rights to the users table for Mysql that could be devistating. you would beable to change all the users passwords with no problems. I really doubt you will find this function in phpmyadmin. phpmyadmin only has functions for the DB that are in it's field list, users not being one of them. so if you signed up as you login then you won't see it, I can't even see my users table when I signon as root. this is my home machine too so I have all the rights in the world.

if you find it let me know, I wanna see it