WPMU DEV, I have

Hello WPMU DEV, I have a strange request. . . when I signed up for your service I must have missed where you create your username, because somehow my username is "Luke69."

Now I'm sure this would be appropriate when I was in 7th grade on IM, but in 2016 on a professional Wordpress development blog, I feel a little strange with a username Luke69. Lol.

Thanks for letting me know how I can have this changed. LOL
Luke