Auth0: How to enable silent authentication in Hosted Login Page?

I’m using hosted screen of Auth0. I want the following scenario to work-

  • Let’s say I have 2 apps- app1 and app2.
  • One of the users signed in by providing email+password in app1.
  • User then navigated to app2.
  • Auth0 detected that the user has already signed in, so it redirects the user back to app2 -
    WITHOUT having her signed in again.

But what I’m facing is this screen-

![alt text][1]

How can I save my user this additional click? How do I implement silent authentication? I know that you have to pass prompt=none to /authorize api, but since I’m not manually calling the api, how do I make the lock call /authorize with prompt=none?