OAuth workflow using ArcGIS API for JavaScript

gistfile1.js

    dojo.require("esri.arcgis.Portal");
    dojo.require("app.OAuthHelper");

    dojo.ready(initialize);

    function initialize() {
      OAuthHelper.init({
        appId:      "q244Lb8gDRgWQ8hM",
        portal:     "http://www.arcgis.com",
        expiration: (14 * 24 * 60), // 2 weeks, in minutes
        popup:      false
      });
      
      if (OAuthHelper.isSignedIn()) {
        displayItems();
      }
      else {
        // Anonymous view
        dojo.style(dojo.byId("anonymousPanel"), "display", "block");
        dojo.style(dojo.byId("personalizedPanel"), "display", "none");
      }
    }
    
    function signIn() {
      OAuthHelper.signIn().then(displayItems);
    }