You can choose any Username that has not already been taken. It must be at least four characters long and may contain letters (no umlauts), numbers, @, _ and -.
The Email address you enter will be used for messages from the system.It is also used to receive mails for password recovery.
The Password must be at least six characters long and consist of a mixed set of characters (uppercase letters, lowercase letters, numbers, special characters). Passwords must contain characters from at least three of these categories.
A strong password would be, for example: A1dmgsg!