My Gamepass Script is not 100% correct, it doesnt authorize every time?

By not efficient, I mean that it doesn't fire to the client enough and sometimes doesn't fire to the client at all! Help!?

function isAuthenticatedforBlowgun(player) -- checks to see if the player owns your pass
	if player then
    	return game:GetService("MarketplaceService"):PlayerOwnsAsset(player, 483225340)
	end
end

function isAuthenticatedforSlots(player) -- checks to see if the player owns your pass
	if player then
    	return game:GetService("MarketplaceService"):PlayerOwnsAsset(player, 483221291)
	end
end
 
while wait(1) do
	for _,plr in ipairs(game.Players:GetPlayers()) do
		local success, message = pcall(function() isAuthenticatedforBlowgun(plr) end)
	    if success and isAuthenticatedforBlowgun(plr) == true then
	        game.ReplicatedStorage.GamepassEvent:FireClient(plr, "Blowgun")
	    end
	end
	for _,plr in ipairs(game.Players:GetPlayers()) do
		local success, message = pcall(function() isAuthenticatedforSlots(plr) end)
		if success and isAuthenticatedforSlots(plr) == true then
			game.ReplicatedStorage.GamepassEvent:FireClient(plr,"4Slots")
		end
	end
end