title: Make Subscriptions available in Google PlayStore
body: <p>I am using <a href="https://github.com/jamesmontemagno/InAppBillingPlugin" rel="nofollow noreferrer">InAppBilling</a> plugin in a Xamarin.Forms solution.
  IAP works in iOS and the app is approved and ready to release.</p>
  <p>HOWEVER, I'm having issues getting this to work with the Google PlayStore.</p>
  <p>The PlayStore returns the message: <code>[productSKU] does not exist</code>.
  But that subscription item is clearly in the PlayStore AND activated with the exact SKU I'm using.</p>
  <p>Does anyone know why a subscription item cannot be found or reached?</p>
  <p>And yes, I've double checked and triple checked that the right SKU was being passed in in this:</p>
  <p><code>var purchase = await billing.PurchaseAsync(**productId**, ItemType.Subscription, verify);</code></p>
  <p>Is there any other obscure setting in the PlayStore that would cause this item to not be found?</p>