Question About Changing Usernames


Didn’t really know what category to put it under, but I thought I’d ask because I wanna make sure I don’t go wrong and lose my username.

If I changed my personal username, am I correct in thinking that will free up my current username, and I’ll then be able to open a new account under the name as a business account?

So, I have the username @123 and I change it to @ABC. Can I then reregister @123 as a new, different account?