Deaths/Kills script with saving in Roblox Studio

Script:

local DataStoreService = game:GetService("DataStoreService")
local dataStore = DataStoreService:GetDataStore("myDataStore")

game.Players.PlayerAdded:Connect(function(player)
    local leaderstats = player:WaitForChild("leaderstats")

    local killsKey = player.UserId.."-Kills"
    local deathsKey = player.UserId.."-Deaths"

    local kills, deaths = 0, 0

    local success, error = pcall(function()
        kills = dataStore:GetAsync(killsKey) or 0
        deaths = dataStore:GetAsync(deathsKey) or 0
    end)

    if success then
        leaderstats.Kills.Value = kills
        leaderstats.Deaths.Value = deaths
    else
        warn("Failed to retrieve data: " .. error)
    end
end)

game.Players.PlayerRemoving:Connect(function(player)
    local leaderstats = player:FindFirstChild("leaderstats")
    if leaderstats then
        local killsKey = player.UserId.."-Kills"
        local deathsKey = player.UserId.."-Deaths"

        local success, error = pcall(function()
            dataStore:SetAsync(killsKey, leaderstats.Kills.Value)
            dataStore:SetAsync(deathsKey, leaderstats.Deaths.Value)
        end)

        if not success then
            warn("Failed to save data: " .. error)
        end
    end
end)