Unable to add a leaderstat?

Hi there!

I've been trying for hours to add the leaderstat "Rebirths". I've tried everything, and it seems I cannot possibly fix it or add it into leaderstats, I'm not the best scripter, but I've tried.

local storage = require(script:WaitForChild("Storage"))

for i,v in pairs(game.Players:GetPlayers()) do
	if storage.GetData(v.UserId) == nil then
		storage.LoadData(v.UserId)
	end
end

HeightBase = 6
game.Players.PlayerAdded:connect(function(player)
	data = nil
	repeat 
		pcall(function() data = storage.LoadData(player.UserId) end)
		wait() 
	until data
	spawn(function()
		repeat wait() until player.Character
		if data.Fuel[1] <= 100 then
			game.ReplicatedStorage.Events.Tutorial:FireClient(player)
		end
	end)
	local F = Instance.new('Folder'); F.Name = 'leaderstats'; F.Parent = player
	local LastRec = math.floor(data.Height / 10) * 10
	local Extra = player:IsInGroup(4301807) and 25 or 0
	for i,v in pairs(data) do
		if i == 'Fuel' or i == 'Height' or i == 'Speed' or i == 'Coins' or i == "Rebirths" then
			local new = Instance.new("NumberValue")
			new.Name = i; new.Value = i == 'Fuel' and (v[1] + Extra) or v
			new.Parent = F
			spawn(function()
				
				while wait() do
					if player and player.Character then
						data = storage.GetData(player.UserId)
						new.Value = i == 'Fuel' and data[i][1] + Extra or data[i]
					end
				end
			end)
		end
	end
	spawn(function()
		while wait() do
			if player.Character and player.Character:FindFirstChild('HumanoidRootPart') and player.leaderstats:FindFirstChild('Height') then
				local Height = math.floor(player.Character.HumanoidRootPart.Position.Y - HeightBase)
				if player.leaderstats.Height.Value < Height then
					data.Height = Height
					local new = data.Height
					if new % 10 == 0 then
						local PPAwrd = (new - LastRec) / 10
						spawn(function()
							pcall(function() game:GetService("PointsService"):AwardPoints(player.UserId, PPAwrd);LastRec = new end)
						end)
					end
				end
			end
		end
	end)
	wait()
	data.Fuel[2] = false
end)

game.Players.PlayerRemoving:connect(function(player)
	local Data = storage.GetData(player.UserId)
	storage.UpdateData(Data)
	storage.SaveData(player.UserId)
end)

The "Storage" script:

local storage = {}
local settings = require(script.Parent:WaitForChild("Settings"))

local DataStoreService = game:GetService("DataStoreService")
local Datastore = DataStoreService:GetDataStore(settings.Key..settings.Version)

function getS(player, cmd)
	local Stats = {
		name = player.Name;
		userId = player.UserId;
		Fuel = {50,false};
		Height = 0;
		Speed = 1;
		Walkspeed = 16;
		JumpPower = 50;
		FuelClick = 1;
		Regen = 1;
		Coins = 0;
		Rebirths = 0;
		Trails ={ {Name = 'Fire'}};
		EquippedT = 'Fire';
		}
	return Stats
end

local function createData(id, cmd)
	local player = nil
	for i,v in pairs(game.Players:GetPlayers()) do
		if v.UserId == id then
			player = v
		end
	end
	
	local tab = getS(player, cmd)
	
	local success, save = pcall(function()
		Datastore:SetAsync(tab.userId,tab)	
	end)
	if not success then
		warn("An error occurred with saving " ..id.. " data: "..save)
	else
		warn("Successfully created " ..id.. " data: "..game:GetService("HttpService"):JSONEncode(tab))
	end
	return tab
end

local module = {
	GetData = function(id)
		local data = nil
		for i,v in pairs(storage) do
			if v.userId == id then
				data = v
			end
		end
		
		return data
	end,
	
	UpdateData = function(tab)
		for i,v in pairs(storage) do
			if v.userId == tab.userId then
				table.remove(storage,i)
			end
		end
		
		table.insert(storage,tab)
	end,	
	SaveData = function(id)
		local data = nil
		for i,v in pairs(storage) do
			if v.userId == id then
				data = v
				table.remove(storage,i)
			end
		end
		local success, save = pcall(function()
			--Datastore:SetAsync(data.userId,data)	
			Datastore:UpdateAsync(data.userId, function(oldData)
				local newValue = data
				return newValue
			end)
		end)
		if not success then
			warn("An error occurred with saving " ..id.. " data: "..save)
		else
			warn("Successfully saved " ..id.. " data: "..game:GetService("HttpService"):JSONEncode(data))
		end
	end,
	
	LoadData = function(id)
		local data = nil
		data = Datastore:GetAsync(id)
		local cmd = 'update'
		if not data then
			data = createData(id, cmd)
		end
		table.insert(storage,data)
		return data
	end,
	
	DeleteData = function(id)
		local data = nil
		data = Datastore:RemoveAsync(id)
		
		
		return data
	end
}

return module