When you register an account, you consent to your personal data being stored and handled as described in the Privacy Notice.
Note that resetting a forgotten password requires a valid email address.
Allowed characters for usernames: Letters A-Z (both uppercase and lowercase), numbers, spaces, underscore _, dash -. Minimum length: 3
Passwords: The minimum length for passwords is 6, and at least one of these has to be either an alphanumeric character or a special character. Other than that, you can even use emoji now. Quote signs and apostrophe are now also okay.