 URLs for various endpoints, these substitution 
      variables are available: 

      * READER_ID: The AMP Reader ID.
      * AMPDOC_URL: The URL of this AMP Document.
      * CANONICAL_URL: The canonical URL of this AMP Document.
      * DOCUMENT_REFERRER: The Referrer URL.
      * VIEWER: The origin of the AMP Viewer.
      * RANDOM: A random number. Helpful to avoid browser cache.
    -->
    <script id="amp-access" type="application/json">
    {
      "authorization": "<% host %>/amp-access/api/amp-au