How do you change a players clothing if they have a gamepass?

So I tried this and it wont work what do I do to fix it?

local MarketplaceService = game:GetService("MarketplaceService")

local Players = game:GetService("Players")

local gamePassID = 0

function onPlayerSpawned(player)

    local hasPass = false

    local success, message = pcall(function()
        hasPass = MarketplaceService:UserOwnsGamePassAsync(player.userId, gamePassID)
    end)       

    if not success then
        warn("Error while checking if player has pass: " .. tostring(message))
        return
    end

    if hasPass == true then

      local pant = Parent:GetChildren()
      for i=1,#pant do
      if (pant[i].className == "Pants") then
        pant[i].PantsTemplate = "http://www.roblox.com/asset/?id=0"
        end
    end
    local shirt = Parent:GetChildren()
    for i=1,#shirt do
    if (shirt[i].className == "Shirt") then
        shirt[i].ShirtTemplate = "http://www.roblox.com/asset/?id=0"
        end
    end

 end
end

game.Players.PlayerAdded:connect(function(player)
 player.CharacterAdded:connect(function()
   onPlayerSpawned(player)
 end)
end)

Players.PlayerSpawned:Connect(onPlayerSpawned)

P.S you can use the fixed version its not just for me its for everyone!