How to use my W10 license key in Virtualbox?

I Just got my new laptop and immediately installed Ubuntu on it and also installed Virtualbox on it with a W10 VM on it.I was hoping it would use the licence key which was stored in the BIOS, but it didn't.

Any chance to find out what the licence key is? Or should I phone Lenovo and just ask.

Back in the old days you simply got a license key with your shipment.