Resolving into ember from jQuery

accountInfo.json

{
  "referral_link":"https://db.tt/2iEFmHsw",
  "display_name":"Louis Simons",
  "uid":23040725,
  "country":"US",
  "quota_info":{
    "datastores":0,
    "shared":31745173,
    "quota":5100273664,
    "normal":438654772
    },
  "email":"lousimons@gmail.com"
}

dropbox_store.js

OurMemories.DropboxStore = DS.Model.extend({
    token: DS.attr('string'),
    user: DS.belongsTo('user'),

    isAuthorized: function() {
        if (this.get('token')) {
            return true;
        } else {
            return false;
        }
    }.property('token'),

    accountInfo: function() {
        // todo Refactor this into https://github.com/instructure/ic-ajax
        var account_info_url = '/dropbox_stores/' + this.id  + '/account_info.json';
        var requestPromise = new Ember.RSVP.Promise(function(resolve, reject) {
            $.getJSON(account_info_url, resolve).fail(reject);
        });
        return requestPromise;
    }.property('token')
});

dropbox_store_controller.js

OurMemories.DropboxStoreController = Ember.ObjectController.extend({
    init: function() {
        self = this;
        this.store.find('dropboxStore').then(function(data) {
            self.set('content', data.objectAt(0));
        });
    },

    usedSpace: function() {
        return this.get('accountInfo.quota_info.normal');
    }.property('accountInfo'),

...