How would I save a players body position?

I have a script in which every second the DataStore stores the postion into the vector3value. In my script this doesn't work. When the person leaves the game the person will spawn back from his/her last position. Can anyone help about what I am doing wrong? thank you!

local DataStore = game:GetService("DataStoreService"):GetDataStore("PlayersPos")

game.Players.PlayerAdded:connect(function(player)
	local character = workspace:FindFirstChild(player.Name)
	local humanroot = character:FindFirstChild("HumanoidRootPart")
	local position = humanroot.Position
	
	local key = "key-"..player.userId
	local folder = Instance.new("Folder",player)
	folder.Name = "Vector3Value"
	
	local cpos = folder.Value
	cpos = position
	
	local save = DataStore:GetAsync(key)
	if save then
		cpos = save[1]
	else
		local load = {cpos}
		DataStore:SetAsync(key,load)
	end
end)

game.Players.PlayerRemoving:connect(function(player)
	local key = "key-"..player.userId
	local load = {player.Vector3Value:FindFirstChild("cpos")}
	DataStore:SetAsync(key,load)
end)

p.s: I am not that good at data store so for those who think I am way off I am sorry :3

Changed function for local players HumaidRootPart every time a HumanoidRootPart property changes then change the value to the CFrame and when a player joins make its HumanoidRootParts' CFrame the value

connect a .Changed function for HumanoidRootPart

make the value of the random numbervalue the CFrame of the HumanoidRootPart

payer join function

player's humanoidrootpart's position is the value of the numbervalue