title: Android IAB. Error - Authentication is required. You need to sign into your Google Account
body: <p>In the Android > Sample app > Trivial Drive when running the app I get the following when doing an IAP:</p>
  
  <pre><code>Error - Authentication is required. You need to sign into your Google Account
  </code></pre>
  
  <p>I've switched to a separate account on my phone with the testing account (i.e. the testing email address I've specified in the Developer Console) and followed all the steps here:</p>
  
  <p><a href="https://android.stackexchange.com/questions/20369/getting-authentication-is-required-when-trying-to-access-the-play-store">https://android.stackexchange.com/questions/20369/getting-authentication-is-required-when-trying-to-access-the-play-store</a></p>
  
  <p>but no joy.</p>
  
  <p>Any further suggestions?</p>
  
  <p>==== UPDATE</p>
  
  <p>I've since blasted away all Google Accounts on my phone and now have just 1 account - i.e. the Testing account.</p>
  
  <p>And I've tried everything here: <a href="https://android.stackexchange.com/questions/20369/getting-authentication-is-required-when-trying-to-access-the-play-store">https://android.stackexchange.com/questions/20369/getting-authentication-is-required-when-trying-to-access-the-play-store</a> </p>