Usernames must not contain spaces
Usernames must not contain any special characters (for example !=$%^&)

 Passwords are case-sensitive
 Passwords must be between 8 and 16 characters long
 Passwords must contain at least 1 alphabetic character
 Passwords must contain at least 1 numeric value
 Passwords must contain at least 1 special character (for example !=%^&, excluding $<>\)