Logging in should change your nick off of BusserXXXXXX

[FugiTech]

When log in is successful the system should check if the user's nick begins with the guest prefix. If so, it should attempt to change the user's nickname to the last attempted non-guest nickname or, if that is now taken, to one of the user's attached nicknames in order of age.

For example:
I join chat as Fugiman
Since I don't login, my nick is changed to Busser123456
Fugi changes nick to Fugiman
I login
The system sees I was a guest and tries to give my Fugiman, but it's taken
They system looks up my attached nicks and sees they are "Fugiman" and "Fugi" (in that order)
Since Fugiman is taken, it assigns me Fugi
Busser123456 is now known as Fugi