I didn't, it gave me this name and I think I'm probably going to need them to delete the account to change it. Yes I could make a 2nd account with another email address but I use the email address for things like this because generally it ends up getting spam.
I've had my primary gmail address since it was an invite only beta service(that's like 15+ years old) and on that I get about 10 spam emails a week. On my other 3 address's I get about 20+ a day.