[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)