Now TV Sky Sports day passes

I recently bought an LG TV with Now TV built in. It came with an offer of 3 months of Sky Movies free and 7 day passes for Sky Sports free. I have used the Movies pass, but I am not interested in the Sports day passes, as I have other means of watching sport, can these Sports day pass codes be used within another account? Or do I have to use them?

Pretty sure they are NOT account specific as you see them for sale on eBay regularly.
HH.

Now tv have added some extra packs,,check them out,,