Make a script gamepass only

Hello, so I was wondering how do I make this script only work when a user has a certain gamepass?

 --[ SERVICES ]--

local Players = game:GetService("Players")

--[ MAIN LOCALS ]--

local PlayerUsage = {} -- Player Table
local syncthing = "/sync ([%w_]+)" --this is a string pattern that should match any player username
local leavesync = "/leavesync" -- string for leaving the sync

--[ FUNCTIONS ]--

game.Players.PlayerAdded:Connect(function(localplr)
	localplr.Chatted:Connect(function(msg)
		
		
		--[{ JOINSYNC }]--
		
		local subjectName = msg:match(syncthing) -- checking to see if it matches text
		
		if subjectName then
			local subject = game.Players:FindFirstChild(subjectName)
			if subject then
				
				-- play animation
				local humanoid = localplr.Character:WaitForChild("Humanoid") -- player humanoid
				local humanoid2 = subject.Character:WaitForChild("Humanoid") -- subject humanoid
				local animator = humanoid:WaitForChild("Animator") -- player animator
				local animator2 = humanoid2:WaitForChild("Animator") -- subject animator
				local AnimationTracks = animator2:GetPlayingAnimationTracks() -- subject animation tracks
				
				for _, v in pairs(AnimationTracks) do
					local track = animator:LoadAnimation(v.Animation) -- requires an animation object
					track.Priority = Enum.AnimationPriority.Action
					track:Play()
					track.TimePosition = v.TimePosition
					track:AdjustSpeed(v.Speed)
				end
			end 
		end
		
		--[{ LEAVESYNC }]--
		
		local leaveName = msg:match(leavesync) -- checking to see if it matches text
		
		if leaveName then
			
			-- stop animation
			local humanoid = localplr.Character:WaitForChild("Humanoid") -- player humanoid
			local animator = humanoid:WaitForChild("Animator") -- player animator
			local AnimationTracks = animator:GetPlayingAnimationTracks() -- player animation tracks
			
			for _,v in pairs(AnimationTracks) do
				v:Stop()
			end
		end
	end)
	
	
end)


--[[ SYNC FUNCTION ]]--

local function sync(player, player2)
	local animator1 = player.Character:WaitForChild("Humanoid"):WaitForChild("Animator") -- Animator 1
	local animator2 = player2.Character:WaitForChild("Humanoid"):WaitForChild("Animator") -- Animator 2
	
	for _,v in pairs(animator2:GetPlayingAnimationTracks()) do
		local track = animator1:LoadAnimation(v.Animation) -- Loading Animation
		track.Priority = Enum.AnimationPriority.Action -- Setting Priority
		track:Play() -- Playing animation
		track.TimePosition = v.TimePosition -- Adjusting Time
		track:AdjustSpeed(v.Speed) -- Adjusting Speed
	end
end

--[[ EVENT FUNCTION ]]--

game.ReplicatedStorage.Sync.OnServerEvent:Connect(function(player, player2)
	if player2 and player2:IsA("Player") then
		local now = tick()
		local LastUsed = PlayerUsage[player] or 0
		if now - LastUsed > 3 then
			PlayerUsage[player] = now
			sync(player,player2)
		end
	end
end)

Related post: Checking if a user has gamepass - #14 by FaKeLoL2006