Application key

I bought mine thru amazon. where do I get the application key from ? does the seller have to send it to me or something ? I looked under the profile setup on hp tuners but nothing comes up...

Edit.... Maybe I am reading it wrong. I have a MPVI 2 so do I not need that ??

There is no application key with the 2.

I got it. I had a Sync issue. Thank you though