This is the command you must use to register your nickname with %S as a player.
You provide a password, and %S responds by telling you that you are registered.
Write down your password!
Passwords are encrypted and stored in the player data file.
This encryption can not be reversed.
In other words: If you lose your password, there is no way to get it back.
SYNTAX: REGISTER name password
Example: /msg %S REGISTER Killer fakepass