text: 
  /**
   * Use a session service to track features that are available to the user.
   */
  angular.module('app')
    .service('Session', function() {
      session = {};
  
      session.create = function(sessionId, userId, userName) {
        this.id = sessionId;
        this.userId = userId;
        this.userName = userName;
      };
  
      session.destroy = function() {
        this.id = null;
        this.userId = null;
        this.userName = null;
      };
  
      return session;
    });
  