I am making a Holo and I need help,Can anyone correct me?

So far this is what I have,I already have a Configuration file but I dont know whats wrong

game.Players.ChildAdded:connect(function(player)
player.Chatted:connect(function(chat)
if player:GetRankInGroup(config.GroupId.Value) >= config.RankId.Value then
	if string.lower(chat) == "sf" then
if not game.Workspace:FindFirstChild("Thing") then
game.Lighting.Thing:Clone().Parent = game.Workspace
end
elseif string.lower(chat) == "close sf" then
if game.Workspace:FindFirstChild("Thing") then
game.Workspace.Thing:Remove()
end
end
end
end)
end)


	

First off, you should use the PlayerAddedevent instead of ChildAdded. Also, it would be better to check if they're and admin once the join the game, instead of every time they chat.

game.Players.PlayerAdded:connect(function(plr)
	if player:GetRankInGroup(config.GroupId.Value) >= config.RankId.Value then --I assume config is defined somewhere?
		plr.Chatted:connect(function(msg)

Don't forget to rearrange you ends after making these changes!