title: Request for TOKEN but no TOKEN returns
body: <p>I have successfully request for credentials.json for Google-Oauthlib tool by following this tutorial: <a href="https://developers.google.com/assistant/sdk/reference/device-registration/register-device-manual#register-instance" rel="nofollow noreferrer">https://developers.google.com/assistant/sdk/reference/device-registration/register-device-manual#register-instance</a>
  . It's something looks like this.</p>
  <p><a href="https://i.stack.imgur.com/UH5pQ.png" rel="nofollow noreferrer">Json return image</a></p>
  <p>According to the tutorial, i find no $ACCESS_TOKEN. Is there a way to claim this? I think there's something to do with the 2 links in &quot;scope&quot; section.
  Btw, i'm trying to personalize google assistant, i want to know if there is a way to control webcam, simply say &quot;Hey Google take a picture&quot;, it takes a picture then show it on the screen for some seconds.</p>
  <p>Thank you for your attention.</p>