Feature Request

[Cobwebster]

Add the command /nickname, new command and methods getNick & setNick.

Maybe using set displayname then a new event on login to see if they have a nick stored to force it when they rejoin since displaynames go after logout.

I can attempt to make a pull request and add it, depends if you'd wanna fix any errors in my code if any. Also if the setdisplayname is the best way to go about it. if so I can attempt to add it myself.