gistfile1.txt

    facebook: function () {
      var route = this;
      FB.login(function (response) {
        if (response.authResponse) {
          var session = route.controllerFor('session');
          session.set('facebookAccessToken', response.authResponse.accessToken)
          session.save().then(function () {
            route.transitionTo('calendar_month')
          });
        }
      });
    },

gistfile2.txt

SessionController = Ember.ObjectController.extend({
  needs: ['user', 'account', 'accountUser'],

  end: function () {
    var controller = this;

    var old = this.get('content');
    this.set('content', controller.store.createRecord('session'));

    return old.destroyRecord().then(function () {
      localStorage.setItem('accessToken', "");
    });
  },

  save: function () {
    var controller = this;

    return this.get('content').save().then(function (session) {
      localStorage.setItem('accessToken', session.get('accessToken'));
      localStorage.setItem('currentAccountUser', session.get('user.accountUsers.firstObject.id'));
      controller.set('controllers.accountUser.content', session.get('user.accountUsers.firstObject'));
    }, function (e) {
      localStorage.setItem('accessToken', "");
      localStorage.setItem('currentAccountUser', "");

      throw e;
    });
  },

gistfile3.txt

Session = DS.Model.extend({
  facebookAccessToken: DS.attr(),
  accessToken: DS.attr(),

  user: DS.belongsTo('user')
});