How do I fix this? -attempt to index nil with 'UserId'-

I am trying to get this script to prompt a purchase to the gamepass if they don't own it, but if they do then it puts the tools in the locations shown below. I keep getting this error though and I don't know what to do to fix this, any help?

local GamePassService = game:GetService("MarketplaceService")
local GamepassId = 0 -- 0 for purpose of asking

        script.Parent.Touched:Connect(function(hit)
            if GamePassService:UserOwnsGamePassAsync(player.UserId, GamepassId) then

        game.ServerStorage.FlyingCarpet:Clone().Parent = player.Backpack
        game.ServerStorage.FlyingCarpet:Clone().Parent = player.StarterGear

    end 
end)