editing the username

i know the user-edit-form says “no editing” regarding the usernames and i am aware of the problems it might bring. But anyways, i wanna do it and am thinking about a way to edit without messing up userid username passwd connection.

i thought about changing the password first and then the username, so that i know which password connects with which username. but i’m unsure if that works out. maybe it’s better to do it via direct changes in the mysql-database? can you wp-geeks help me with planing/finding a good solution?

i wanna do this, because i’ve recently had some automated registrations before i’ve installed a plugin to avoid those. i don’t wanna loose those ids and rather give them to some of my friends, who haven’t registered yet. thanks for helping me.