"rebirths is not a valid member of Folder" why do i get this error?

local dataStoreService = game:GetService("DataStoreService")
local karenDataStore = dataStoreService:GetDataStore("karenDataStore")

game.Players.PlayerAdded:Connect(function(player)
    local leaderstats = Instance.new("Folder")
    leaderstats.Name = "leaderstats"
    leaderstats.Parent = player

    local rebirths = Instance.new("IntValue",leaderstats)
    rebirths.Name = "Rebirths"
    rebirths.Value = 0
    rebirths.Parent = leaderstats --Changed it to the instance shortcut

    local level = Instance.new("IntValue",leaderstats)
    level.Name = "Level"
    level.Value = 1
    level.Parent = leaderstats --Changed it to the instance shortcut

    local cash = Instance.new("IntValue",leaderstats)
    cash.Name = "Cash"
    cash.Value = 0
    cash.Parent = leaderstats --Changed it to the instance shortcut





    local success, errormessage = pcall(function()
        datarebirths = karenDataStore:GetAsync(player.UserId,"-rebirths")
        datalevel = karenDataStore:GetAsync(player.UserId,"-level")
        datacash = karenDataStore:GetAsync(player.UserId,"-cash")

        print("data call succesful")
    end)


end)
game:BindToClose(function() -- This code will run BEFORE the game closes, in other words the game cannot close until this code has ended

    for _, player in pairs(game.Players:GetPlayers()) do -- loops through the players to get the player

        local success, errormessage = pcall(function()
            karenDataStore:SetAsync(player.UserId.."-rebirths",player.leaderstats.Rebirths.Value) -- Capitalization
            karenDataStore:SetAsync(player.UserId.."-level",player.leaderstats.Level.Value) -- Capitalization
            karenDataStore:SetAsync(player.UserId.."-cash",player.leaderstats.Cash.Value) -- Capitalization

            print("working")
        end)
        if success then
            print ("Data Saved")    
        else
            print("Error, i am now sentient human")
            warn(errormessage)
        end

    end
end)

kk so this isnt the best way to make a datastore but ill show you what you did wrong with -- and ima fix it accept if helps