Help w/ commands?

I would do it like this:

StartClone = game.Workspace.World:clone()
Prefix = ";"
local Admins = {"NlLES","PreyStar"}


function checkAuthority(name)
	for a,v in pairs(Admins) do --For every Admin in the table
		if v == name then --If the name matches a name in the table
			return true
		end
	end
	return false --It will only get to this point if it hasn't returned true already.
end


game.Players.PlayerAdded:connect(function(Plr)
	Plr.Chatted:connect(function(Msg)
		print(Plr.Name.." Said: ".. Msg)
		if Msg:sub(1, 1) == Prefix then
			Msg = Msg:lower()
			local MsgS = Msg:sub(2)
			print(MsgS)
			if (MsgS == "resetplace" or MsgS == "reset place") and checkAuthority(Plr.Name) then
				game.Workspace.World:remove()
				StartClone.Parent = game.Workspace
				StartClone = game.Workspace.World:clone()
			elseif MsgS == "settings" then
				Plr.PlayerGui.Tools.Settings.Visible = true
			elseif MsgS == "cmds" or MsgS == "commands" then
				Plr.PlayerGui["CommandGui's"].Gui.KeyCharacter.Text = "Prefix - "..Prefix
				Plr.PlayerGui["CommandGui's"].Gui.Visible = true
			end
		end
	end)
end)