title: How to add custom middleware to Laravel Nova
body: <p>I am not 100% expert with Laravel routes, so I am finding some issues trying to accomplish the following:</p>
  <ul>
  <li>on each an every Nova page requested, I need to first verify that a token is obtained and valid on an external service (it expires every 30').</li>
  <li>I have a controller handle managing that and working fine. My problem is that I don't hit the nail with adding this verification to a middleware.</li>
  <li>In other words, before displaying any Nova view, I need to check that this token is not expired. If it is, I post a call and refresh it.</li>
  </ul>
  <p>I've googled around and found no similar question/issue.
  Anyone can give me an enlighting example?</p>
  <p>Thanks in advance.</p>