title: How to force Nuget to ask for authentication when connecting to a private feed?
body: <p>I am getting 401 unauthorized error when trying to restore packages from my company's feed at xxx.pkgs.visualstudio.com (xxx is company name). I want to clear or reset the authentication information Nuget is using and get the authentication prompt again in Visual Studio 2015 to enter the username and password. </p>
  
  <p>How do I go about doing this?</p>