title: DialogFlow V2 user id?
body: <p>Is there a way to track user Id between conversations without requiring the user to connect their Google account? Like an anon userId. I don't see any id field in the docs: <a href="https://dialogflow.com/docs/fulfillment#request" rel="nofollow noreferrer">https://dialogflow.com/docs/fulfillment#request</a></p>