ember-simple-auth - help get me over the final hurdle

I am trying to port an app that is early in development from .NET to Node/Sails/Passport. The UI is an emberjs app. The backend can authenticate users using Facebook. That is tested and working.

To now start integrate that into the UI i have made the following commit:

http://ift.tt/1AJhcwG

As you can see I am pulling in ember-simple-auth

Now, I have no idea how to get ember-simple-auth to see that once I visit http://ift.tt/1BKOxW1 and authenticate that I now have a valid session with the server.

Inside my header (http://ift.tt/1AJhaop) i am doing:

{{#if session.isAuthenticated}}
      the user is authenticated
{{/if}}

but this is never true.

So my q is how do i finish off wiring all this up?