I Tried out Datastores, and tried to save a value for a player to the server and nothing happened?

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

game.Players.PlayerAdded:Connect(function(player)
	
	local leaderstats = Instance.new("Folder")
	leaderstats.Name = "leaderstats"
	leaderstats.Parent = player
	
	local Cash = Instance.new("IntValue")
	Cash.Name = "Cash"
	Cash.Parent = leaderstats
	
	local playerUserId = "Player_"..player.UserId
	
	-- Load Data
	
	local data
	local success, errormessage = pcall(function()
		data = myDataStore:GetAsync(playerUserId)
	end)
	
	
	if success then
		Cash.Value = data
		-- Set our data equal to the current Cash
	end
	
	
end)


game.Players.PlayerRemoving:Connect(function(player)
	local playerUserId = "Player_"..player.UserId
	
	local data = player.leaderstats.Cash.Value 
	
	local success, erromessage = pcall(function()
		myDataStore:SetAsync(playerUserId, data)
	end)
	
	if success then
		print("Data saved successfully!")
	else
		print("There was an error!")
		warn(erromessage)
	end
	
end)

The problem is that when the last player in the game leave, the server will shut down immediately and this also happens the same when you shut down the server with players still in the game so you would need to make sure that their data is save. So what you should do is just add this code:

game:BindToClose(function()
	repeat 
	local player = game.Players:GetChildren()
	wait(1)
	until #player = 0
end)

Hope this help!