Load the resulting page/HTML using your HTTP server of choice (in this example we used node.js and http-server ). Then click ...

Load the resulting page/HTML using your HTTP server of choice (in this example we used node.js and http-server). Then click the button to launch a popup that will authenticate the user. After completing authentication, the SDK will provide your application with information about the user who authenticated based on the contents of the token via the getCachedUser method (see "showWelcomeMessage" above) and write the token to the console.