title: How to identify a google home (mini) device?
body: <p>I want to identify a google home device via the SDK request / response call to serve the request properly. Basically I need this information to know the location / room / floor / venue where this device is installed or kept. </p>
  
  <p>Example: If I make a request to google mini - "Switch off the lights", I want to know the device id so the service can do a lookup and find the room where this device is located and switch off the lights of that room.</p>
  
  <p>I don't need this for android phones/devices. It is very specific to google home devices.</p>
  
  <p>I have seen <code>originalRequest.data.user.userId</code> but not sure if i can use this (as user of the device will not have any google login or account linking)</p>
  
  <p>Is this information is exposed via dialogflow api?</p>