title: How to use private npm package feed on visual studio team services build and release management
body: <p>I started usign a private npm feed on my visual studio team services account, following their guide and having added a .npmrc file</p>
  
  <pre><code>registry=https://ascend-xyz.pkgs.visualstudio.com/_packaging/AscendNPMFeed/npm/registry
  always-auth=true
  </code></pre>
  
  <p>The problem is that the build pipeline dont work now since it require some packages from this private package. </p>
  
  <p>What is the proper setup for telling npm that it can authenticate using the build access token on visual studio team services?</p>
  
  <p>Do i need to set a environment variable, call npm login or someting as a build step?</p>