Can I have a little help with saving and loading? [UNSLOVED]

So this script is suppose to add values to a player, then using datastore, save and load their values. When I am the only player on the server, it will not save the value, I have a different script that changes the values to make sure it is saving or not, it is currently not, in play solo it works, but not a real server. Please help me.

ds=game:GetService("DataStoreService"):GetGlobalDataStore()
hs=game:GetService("HttpService")



local lastPlrStats={ }
local lastPlrName=""
local lastPlrId=nil
local guy=nil
local guystats=nil
local lastPlrStats=""


game.Players.PlayerAdded:connect(function(plr)
	local stats=Instance.new("IntValue")
	stats.Name="Stats"
	stats.Parent=plr
	--Values here for creating new stats for every player
	local starterchoosen=Instance.new("IntValue")
	starterchoosen.Name="StarterChoosen"
	starterchoosen.Parent=stats
	
	local firstpokemon=Instance.new("IntValue")
	firstpokemon.Name="FirstPokemon"
	firstpokemon.Parent=stats
	
	if ds:GetAsync(plr.userId.."Stats")~=nil then
		--Values here for loading stats already saved
		local userstats=hs:JSONDecode(ds:GetAsync(plr.userId.."Stats"))
		starterchoosen.Value=userstats[1]
		firstpokemon.Value=userstats[2]
		
	else
		--Values here for loading stats not saved (creating new stats for a player that hasn't played yet)
		starterchoosen.Value=0
		firstpokemon.Value=0
	end
end)

game.Players.PlayerRemoving:connect(function(plr)
	--Values here for saving stats (other than last person)
	ds:SetAsync(plr.userId.."Stats",hs:JSONEncode({
		plr.Stats.StarterChoosen.Value;
		plr.Stats.FirstPokemon.Value;
		}))
	
	
end)

game.OnClose=function()
	print("Im dniog sothmineg")
	ds:SetAsync(lastPlrId.."Stats",lastPlrStats)
	print("saved")
end

while wait() do
	local players=game.Players:GetPlayers()
	if #players==1 then
		lastPlrName=players[1].Name
		lastPlrId=players[1].userId
	else
		lastPlrName=""
		lastPlrId=nil
	end
	if lastPlrId~=nil then
		guy=game.Players[lastPlrName]
		print("adding guy's stats")
		--Values here for the last player's stats to save
		guystats={
			guy.Stats.StarterChoosen.Value;
			guy.Stats.FirstPokemon.Value;
		}
		
		lastPlrStats=hs:JSONEncode(guystats)	
	end
end

It's better to use .Changed on the leaderstats and not .PlayerRemoving