How to authenticate after facebook login?

My app uses passportjs on the server to authenticate users via facebook. Once logged in the server redirects back to the app and sets cookies for userid and access_token.

How can I make ember-simple-auth at this point detect the authentication was successful? Currently I have a second login button that verifies the access_token with my server’s api and then creates a session.

Apologies for the noobish question. I am new to ember and authentication.