Is there any way to change your account username?

[twofoursixeight]

Direct rip from the linked guide:

@wiki

Renaming Your Account

You can also request an account rename. However, it will only be acknowledged when necessary. For example, if you don’t like your account name, if you want to change it just for fun, or something else; your account rename request will not be acknowledged. However, if your account name violates the rules, that is, it’s too long, it has too many caps, it’s inappropriate, and so on; then your account can be renamed.

1. Follow UUID Login to verify your identity. If you are unable to login, then we cannot help you, sorry. You can create a new account if you wish.
2. If you haven’t already, sign up for a forums account and log in .
3. Then, message staff for an account rename.