title: Setting the external proxy which requires authentication for Postman
body: <p>I am setting up the native windows Postman and trying to run the "Request Header" api provided in Postman Echo collection. I get the following error. </p>
  
  <p>"Error: tunneling socket could not be established, statusCode=407"</p>
  
  <p>I can see in the postman console that it is picking up the correct proxy server from environment. My proxy server requires authentication, how do I provide credential information. I tried to start Postman using the following command but it did not help.</p>
  
  <p>postman.exe --proxy-server=userName:password@myproxy:8090</p>