Accessing session in everyauth.password?

I'm working on a node express app, and I've got it working well with the Facebook authentication already. I'm now attempting to enable our own email/password login and running it to a roadblock. With Facebook I am able to access and write to the session during auth:

everyauth.faceboook
    // Basic stuff
    .findOrCreateUser( function( sess, accessToken, extra, fbUser) {
        var promise = this.Promise();
        sess.myvar = myvar

        // Find user in DB, etc
        promise.fulfill(fbUser);
        return promise()

This works great as I can save some stuff I need later to the session right in this method. But I'm not sure how to do the same thing when using everyauth password login:

everyauth.password
    // Basic stuff
    .authenticate( function(email, password) {
        var promise = this.Promise();             
        // Create new user in DB, etc

        // Now I need to save stuff to the session but I'm not sure how to access
        // it in here...
        promise.fulfill(newUser)
        return promise

So is there any way to access the session in the authenticate and login methods (which use the same API) of everyauth.password?