bast way to handle server session reset with ember simple auth

I am using the ember simple auth. i really like it as it have taken care alot of stuff I need. However I am wondering if there is a good pattern to deal with the situation when the serverside reset the session but sesssion.isAuthenticated saying is still valid.

I am using a custom authenticator and authorizer (just FYI). In my usecase I like to able to hook into a modal poping up for signin when serverside have expired. There are a few ways to go about it I suppose but I am wondering if there are better practices out there.