You have a way to get your fogotten password but no way to get
user & password if you forget both.
You should fix this. I could not reregister a second time because I got message email address in Use.
I had to make up a new email address to work around this.
Hello, When you choose reset password either by username or email you will be sent a email asking you to verify that it was you who choosed to reset your password. This is done by clicking the link in the email.
You will then be sent a new email which contains the following
Your username is: USERNAME
Your email address is: EMAIL
Your new password is: PASSWORD
So you see it does remind you of your username.
Also for future ref there are disposable email address that you can use for registration that require no sign up. and dispose after ten minutes.