title: gcloud not recognized as an internal or external command on Windows
body: <p>I am installing Google App Engine under Windows (not using Cygwin).
  After running the bat script, I closed and reopened the <code>cmd.exe</code> and entered inside the <code>google-cloud-sdk</code> directory. When I ran the command <code>gcloud auth login</code>, I'm getting the error:</p>
  
  <pre><code>'gcloud' is not recognized as an internal or external command,
  operable program or batch file.
  </code></pre>