Solved [EASY] show/hide players

Very simple, no name nothing just two simple commands, /show and /hide. Self explanatory, /show shows all the players, /hide hides all the players. And a little config that allows enabling/disabling certain worlds. Last thing in config, the ability to edit the message when you use /hide or/show and that players are already on or off.
I need this extremely fast! shouldn't be that hard to make.
Thanks!

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EDIT by Moderator: merged posts, please use the edit button instead of double posting.