I registered at your casino, and with the username and password filled in automatically when clicking the registration button, this could be easier for registrants, only need to change the password as desired, because using the password provided is certainly not safe.
The system-given password can be changed but how about your random username, is it possible for changing?
Additionally, were you informed that username is only allowed to chance one time after registration?
Or is it alowed to change multiple times?
Most platform only allow username change for one time, to change from a random username to your chosen username.
On this platform they allow changing of username once maybe due to the fact that they assigned username and password automatically for quick registration.
Duelbits, Empire and so on allow change of username many times as you want since they use email address when you sign up.