title: Android In-App Billing error You need to sign into your google account
body: <p>I am implementing in-app purchase using <a href="https://github.com/anjlab/android-inapp-billing-v3" rel="noreferrer">https://github.com/anjlab/android-inapp-billing-v3</a> .
  But while in app pop up open it shows "Error Authentication is required.You need to sign into your google account".
  I tested using different devices as same result.</p>