What are the requirements for usernames and passwords?

Usernames should not have any spaces and should only contain letters (a-z), numbers (0-9), and underscores.

The length of a username should be between 5-15 characters.

Passwords should be 6-128 characters, including letters (a-z), numbers (0-9), and symbols (“! # $ & ( ) * + , - . : ; < = > ? @ [ ] ^ _ { | } ~”).

Passwords should not contain spaces.