If you're asking what I think you're asking, then all you have to do is log in once with a username and password of your choice and it will automatically register an account for you.
If this didn't answer your question, then just tell me and I'll try better explain (?).
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Does anyone have any idea how to supply login details to log in?
If you're asking what I think you're asking, then all you have to do is log in once with a username and password of your choice and it will automatically register an account for you.
If this didn't answer your question, then just tell me and I'll try better explain (?).