Tracking usage of credentials is important.
If you are signed up as a mobile application developer or an issuing entity, you should now see a new tab called "Usage" in your account window. It is pretty simple for now, but you can keep track of a few key metrics.
For mobile app developers:
-keep track of how many API calls to remote virtual cards have been made by your mobile application per card.
For issuing entities:
-keep track of how many API calls have been made from mobile applications to your virtual card
-keep track of how many management calls have been made to your virtual cards
-your account balance