title: Can't finish setup for the assistant
body: <p>I followed this guide for installing the google assistant library on my raspberry pi 3b with USB out and USB mic.
  Link to guide: <a href="https://developers.google.com/assistant/sdk/guides/library/python/" rel="nofollow noreferrer">https://developers.google.com/assistant/sdk/guides/library/python/</a></p>
  
  <p>I get all the way to "run the sample code" without errors but when I run the sample code I get this:</p>
  
  <pre><code> googlesamples-assistant-hotword --project_id SAMPLE_PROJECT_ID --device_model_id SAMPLE_MODEL_ID
  device_model_id: SAMPLE_MODEL_ID
  
  device_id: SAMPLE_DEVICE_ID
  
  https://embeddedassistant.googleapis.com/v1alpha2/projects/SAMPLE_PROJECT_ID/devices/SAMPLE_DEVICE_ID 403
  
  ON_MUTED_CHANGED:
    {'is_muted': False}
  ON_START_FINISHED
  [1726:1743:ERROR:http_client_with_backoff.cc(113)] Retrying request with http_status=200 request_id=1
  </code></pre>
  
  <p>Please help!</p>