Opening a WSDL URL with Basic Authentication

I created a Mulesoft SOAP API project and its now currently deployed in Cloudhub. This SOAP API also has Basic Authentication.

The issue I'm having is when creating a new SOAP Project and use the Mulesoft Endpoint URL WSDL link. This is the error I'm getting in SOAP UI.

This is the WSDL link that I'm using:

http://<username:<password>@<mulesoft endpoint URL>?WSDL

But when I try to use the WSDL Link in POSTMAN it is showing on what the WSDL file contains.