display portal username in WAB application

[esriuser2]

I want to get the usernames for the portal userid's that I am displaying in my simple table in WAB application. Any ideas?

Thank you!

[KenBuja · Accepted solution]

This is how I set a text box (ownername) to the user's name (using the class 'jimu/portalUtils')

this._portal = portalUtils.getPortal(this.appConfig.portalUrl);
this.ownerName.set('value', this._portal.user.username);‍‍

[BenjaminLedos]

where should I put these lines of code to see the username?