title: Non-expiring session in box view
body: <p>How can I create a non-expiring session in Box view?
  I know that you can change the session time with</p>
  
  <pre><code>curl https://view-api.box.com/1/sessions \
  -H "Authorization: Token YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"document_id": "THE_DOCUMENT_ID", "duration": 60}' \
  -X POST \
  -i
  </code></pre>
  
  <p>but What should I put in the duration value?</p>