Why doesn't my datastore work, it doesn't print anything or give errors?

I followed theDevKings tutorial on datastores and yet it doesn't work. It could be that my script is outdated as the video is almost a year old.

Here is the script:

local dataStoreService = game:GetService("DataStoreService")
local dataStore1 = dataStoreService:GetDataStore("dataStore1")
local dataStore2 = dataStoreService:GetDataStore("dataStore2")

game.Players.PlayerAdded:Connect(function(plr)
	
	local leaderstats = Instance.new("Folder",plr)
	leaderstats.Name = "leaderstats"
	
	local Flips = Instance.new("IntValue",leaderstats)
	Flips.Name = "Flips"
	Flips.Parent = leaderstats
	
	local Money = Instance.new("IntValue",leaderstats)
	Money.Name = "Money"
	Money.Parent = leaderstats
	
	local userID = "Player_"..plr.UserId
	
	local flipdata
	local moneydata
	local success, errormessage = pcall(function()
		flipdata = dataStore1:GetAsync(userID)
		moneydata = dataStore2:GetAsync(userID)
	end)
	
	if success then
		Flips.Value = flipdata
		Money.Value = moneydata
	else
		warn(errormessage)
	end
	
end)

game.Players.PlayerRemoving:Connect(function(plr)
	
	local userID = "Player_"..plr.UserId
	
	local flipdata = plr.leaderstats.Flips.Value
	local moneydata = plr.leaderstats.Money.Value
	
	local success, errormessage = pcall(function()
		dataStore1:SetAsync(userID, flipdata)
		dataStore2:SetAsync(userID, moneydata)
	end)
	
	if success then
		print("Cool, data saved")
	else 
		print("Not cool, data not saved")
		warn(errormessage)
	end
end)