Community Username Change Request

I've had this since 2007, because my first car was a Subaru Impreza WRX STi

Now, STI means sexually transmitted infection and well, I'd really like to still use this account and not create a new one (2007 rep!) so if possible I'd like to request the ability to set a new one.

I am unsure if this is something I can fill in once done, or if I need to provide the requested username - if able/willing to change please advise!

Thank you for all of your assistance.