Username may contain only digits, upper and lower case letters and underscores.
E-mail address must have a valid e-mail format. All e-mails from the system will be sent to this address. The e-mail address is not made public and will only be used if you wish to receive a new password or wish to receive certain news or notifications by e-mail.
Password must be at least 6 characters long. Must contain one upper case letter (A..Z), one lower case letter (a..z), one number (0..9).