emailNotifications () {
    const notificationsURLParts = ['api/v3/email_notifications'];
    return {
      get: (callback) => {
        return this.get(notificationsURLParts, callback);
      },

      set: (notifications, callback) => {
        const opts = {
          data: JSON.stringify({ notifications }),
          dataType: 'json'
        };
        return this.put(notificationsURLParts, opts, callback);
      }
    };
  }
API to enable/disable email notifications, such as DO notifications