Can i save and load IntValues in Studio?

So i make a hunger bar thrist bar and a thirst bar all IntValues in Player but when i try use this script

local DS = game:GetService("DataStoreService"):GetDataStore("SaveMyData2")
game.Players.PlayerAdded:Connect(function(plr)
	wait()
	local plrkey = "id_"..plr.userId
	local savevalue = plr.HungerVal
	local savevalue2 = plr.MedicineVal
	local savevalue3 = plr.ThirstVal

	
	local GetSaved = DS:GetAsync(plrkey)
	if GetSaved then
		savevalue.Value = GetSaved[1]
		savevalue2.Value = GetSaved[2]
		savevalue3.Value = GetSaved[3]
		
	else
		local NumbersForSaving = {savevalue.Value, savevalue2.Value, savevalue3.Value}
		DS:GetAsync(plrkey, NumbersForSaving)
	end
end)

game.Players.PlayerRemoving:Connect(function(plr)
	DS:SetAsync("id_"..plr.userId, {plr.HungerVal.Value, plr.MedicineVal.Value, plr.ThirstVal.Value})
end)

And i get an error saying the HungerVal is not a valid member of Player. But when im in-game I open up Players i open Princess_Fexi007 i see there the HungerVal! How i save the IntValues so when i rejoin the game the bars are not filled up again?

This is the Bar script

local HG = script.Parent
local Text = HG:WaitForChild("Back"):WaitForChild("Text")
local Plr = game.Players.LocalPlayer

repeat wait() until Plr.Character

local Hum = Plr.Character:WaitForChild("Humanoid")
local MaxThirst = 100
local DecreaseRate = 7 -- 15 seconds = -1 hunger
local ThirstValue

if Plr:FindFirstChild("ThirstVal") then
	ThirstValue = Plr.ThirstVal
	ThirstValue.Value = MaxThirst
else
	Instance.new("IntValue", Plr).Name = "ThirstVal"
	Plr.ThirstVal.Value = MaxThirst
	ThirstValue = Plr.ThirstVal 
end

ThirstValue.Changed:connect(function()
	Text:TweenSize(UDim2.new(ThirstValue.Value/MaxThirst,0, 1,0), "Out", "Linear", .2, true)
end)

while wait(DecreaseRate) do
	if ThirstValue.Value - 1 >= 0 then
		ThirstValue.Value = ThirstValue.Value - 1
	end
	
	if ThirstValue.Value == 0 then
		repeat wait(1)
			Hum.Health = Hum.Health - 2
		until ThirstValue.Value > 0 or Hum.Health <= 0
	end
end