Changing Community Username
How do I change my community username. I created it almost 20 years ago, would love to update it to my Apple ID or something close to it.
Welcome,
You can contact the hosts by email here —> communityaccounts@apple.com
Contacting them by email with a few name suggestions means they may be able to give you one of those. Otherwise the hosts appear to randomly assign you one—which you may or may not like. If you find you already have one assigned by the hosts without consultation then it may be another community helper reported your wish directly to the hosts and didn’t post here to say that. If you want a name you would like I would act quickly. ;-)
Getting a new community name is a bit of an exception so choose one that you like permanently.
From: https://discussions.apple.com/terms section A13