Not able to get current portal logged in user in the deployed custom WAB application

[BGGroup]

I have been successful in getting the portal user in a widget developed using  WAB developer version  v1.0 . Below is code snippet to get the portal  user.

"this.portal = portalUtils.getPortal(this.appConfig.portalUrl);

var username = this.portal.user.username;"

I am able to get the the current portal username when I debug the widget. I am even able to get the portal username when I launch it through web app builder app url.

The issue is when download the code and deploy it in IIS. The application throws the error and the username is undefined . On further debugging what I could find is the application is not able get the portal username.

Any guidance  on issue would be great.

[JunshanLiu]

When open builder, user has to sign in, so you can get user info. But if the app is deployed in other web server, user is not signed in unless a private resource is requested. So, if you want to get user info in app that deployed in other web server, you can create a widget, which has the login feature .