Data Store Script Doesn't Save Data. Help?

It will not save any data at all. It prints no errors at all.

-- Variables
local Players = {};
local NumPlayers = #Players;
local ReplicatedStorage = game:GetService("ReplicatedStorage");
local Assets = ReplicatedStorage:WaitForChild("Assets");
local Rounds = Assets:WaitForChild("Rounds");
local LavaRise = Rounds:WaitForChild("LavaRising");
local Stand = LavaRise:WaitForChild("Stand");
local PlayerStats = Assets:WaitForChild("Player_Stats");
local DataStoreService = game:GetService("DataStoreService");
local DataStore = DataStoreService:GetDataStore("MiniGamesV1");

local GameRounds = {"LavaRising",};

-- Functions/Main Game
function addPlayer(Player)
	table.insert(Players,Player);
end

function removePlayer(Player)
	for i,v in pairs(Players) do
		if v == Player then
			table.remove(Players,v);
		end
	end
	local Stats = PlayerStats:FindFirstChild(Player.Name);
	Stats:Destroy();
end

function chooseRound()
	local random = math.random(1,#GameRounds);
	local Picked = GameRounds[random];
	return Picked;
end

function LavaRising(Map,Lava,Stands)
	
end

function Joined(Player)
	addPlayer(Player); -- Adds player to the table "Players"
	local Stats = Instance.new("Folder");
	Stats.Name = Player.Name;
	Stats.Parent = PlayerStats;
	local Wins = Instance.new("NumberValue");
	Wins.Name = "Wins";
	Wins.Parent = Stats;
	Wins.Value = 0;
	local Coins = Instance.new("NumberValue");
	Coins.Name = "Coins";
	Coins.Parent = Stats;
	Coins.Value = 1000;
	local XP = Instance.new("NumberValue");
	XP.Name = "XP";
	XP.Parent = Stats;
	XP.Value = 0;
	local userdata;
	pcall(function()
		userdata = DataStore:GetAsync("!"..Player.userId);
	end)
	if userdata then
		warn("Got "..Player.Name.."'s data!");
		Wins.Value = userdata.Wins;
		Coins.Value = userdata.Coins;
		XP.Value = userdata.XP;
	else
		warn(Player.Name.." has no saved data yet!");
	end
end

function leave(Player)
	removePlayer(Player); -- Removes player from table "Players"
	local Stats = PlayerStats:FindFirstChild(Player.Name);
	local wins = Stats.Wins;
	local coins = Stats.Coins;
	local xp = Stats.XP;
	local StatTab = {Wins = wins.Value,Coins = coins.Value,XP = xp.Value};
	local userdata;
	pcall(function()
		userdata = DataStore:GetAsync("!"..Player.userId);
	end)
	if userdata then
		DataStore:UpdateAsync("!"..Player.userId,StatTab);
	else
		DataStore:SetAsync("!"..Player.userId,StatTab);
	end
end

game.Players.PlayerAdded:Connect(Joined);
game.Players.PlayerRemoving:Connect(leave);