title: Passing Kerberos Credentials in PDFKIT python pdf generator tool
body: <p>I have a URL which requires Kerberos Credentials (single sign on) for Authentication. I need to generate PDF of this URL response webpage. but when i am trying using pdfkit  i am getting authentication error. Can anyone please provide the necessary headers need to be set.</p>
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>import pdfkit
  
  options = {
      'custom-header':  [('WWW-Authenticate:', 'negotiate')]
  }
  
  
  pdfkit.from_url(
      'URL-link',
      'shaurya.pdf', options=options)</code></pre>
  </div>
  </div>
  </p>