title: Save In-app Billing subscription status in Firebase Database
body: <p>So, in-app billing docs suggest to save subscription status and expiration date on your server and make a validation call to Google Play only near subscription expires.</p>
  
  <p>I was wondering, how could I validate something like this, before saving to Firebase Database, so not just any user could save this status and date in the database? </p>
  
  <p>As far as I know you can only integrate Google Play app to Firebase for Analytic purpose. Am I missing something?</p>