Multiple eqemulator accounts?

[godbox]

Hi,
Played heavily here from 2011-2015ish. Thought I might dip a toe back in
I see that there is now a way (mandatory?) to link eqemu account(s?) to p99 forum account. So question is I have 3 different old eqemu accounts from back then and I don't recall without logging into the game which one is the right one. So...

a) do you have to link accounts to login?
b) can you associate multiple eqemu accounts with your p99 account?