Nostalrius Begins - Quality wow vanilla realm (1.12)

I am unable to log into the game for the first time.

I'm fairly confused on the account creation process, but I created one on https://en.nostalrius.org/, which I assume is the one for the game itself.
I'm fairly sure I can't log in because my username is too long. I made a username which is 19 characters in length, and doesn't actually fit into the Username bar in the game login.

I'm tech savvy, I guess, so I can provide any needed screenshots or anything else. I'm not sure if there is a specific area for creating tickets or anything... Anyway, if my account can either be renamed, or if I have to just create an entirely new one, please let me know.

Go to https://en.nostalrius.org/register to make a game account. yes it is separate from your forum account and yes 19 characters is going to be too long. make it under 16.

Thanks. I didn't know the username is too long, but I've made a new one. Nice server so far, by the way.