Mobiilivarmenne (Mobile Certificate) scratch number

Hiello Elisa community,

I just recently moved to Finland (apologies, my Finnish is poor!). Three days ago, purchased a post-paid mobile phone subscription at the Elisa store in-person.

I was given a new SIM card and phone number. I cannot use the OmaElisa app yet or create an account, since I do not have banking credentials yet. 

However, my SIM card has “TUNNUSLUKU: MOBIILIVARMENNE #####” and a number is revealed when you scratch it. What is this number for? I go to the https://varmenne.elisa.fi/ website, but there doesn’t seem to be a place where I can enter the number.

Thanks!