Did Codecadmy create my Username?

Hi. I have been taking a codecademy Java course for a few months. This is my first time using the forum. I notice that my username is “Ajax7478335466”. I don’t remember creating this name, theres no reason I would use this name. Did Codecadmy create this name? How did I get this username?

Welcome, @ajax7478335466,

What is your username on the main site (CC-LE)?