Ember Simple Auth - authenticated route model hook called before authenticate promise resolves

So I have a simple ESA setup with a custom authenticator/authorizer wrapping Basic HTTP Auth. The login route uses UnauthenticatedRouteMixin and the login controller is basically just authenticating against the custom authenticator, and afterwards fetches the user object from a REST service:

export default Ember.Controller.extend({
  session: Ember.inject.service('session'),

  actions: {
    login() {

      var self = this;

      let { userName, password } = this.getProperties('userName', 'password');
      this.get('session').authenticate('authenticator:basicauth', userName, password).then(function ()
        {

            self.store.queryRecord('user', { loginname : userName }).then( function (user) {

              console.log(user.get('id'));

              self.get('session').set('data.filterUserId', user.get('id'));

            });

        }).catch((reason) => {
            this.set('errorMessage', reason.error || reason);
        });

    }
  }

});

Now, in the first authenticated route (via AuthenticatedRouteMixin), for testing I also simply console.log the stored session property:

import Ember from 'ember';
import AuthenticatedRouteMixin from 'ember-simple-auth/mixins/authenticated-route-mixin';

export default Ember.Route.extend(AuthenticatedRouteMixin, {

    session: Ember.inject.service('session'),

    model: function () {    

        console.log(this.get('session.data.filterUserId'));

    },

});

In the console output, I observe that the model hook seems to be executed before the authenticator's promise is resolved, i.e. first I get "null", then the ID.

How can I make the AuthenticatedRoute wait for the actual login authentication to resolve?