[ADMIN COMMAND] How to create?

Question 1: If I want the script of the "message hello world" script to recognize the function * message *

Question 2: If for example I would like that when the player writes "message hello world" the word message is deleted in the print?

script.Parent = game.ServerScriptService

local Authorization = {"NiniBlackJackQc","DAHUI84","Player1"}

function isAuthorized(player)
	if player.UserId == game.CreatorId then
		return true
	end
	for _, name in pairs(Authorization) do
		if name == player.Name then
			return true
		end
	end
end

game.Players.ChildAdded:connect(function(player)
	player.Chatted:connect(function(chat)
		if isAuthorized(player) then
			if string.lower(chat) == "admin" then
				print(player.Name.." is a ( owner ) - ( admin ) !")
			end
		end
	end)
end)