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