title: Proper use of app.set in express?
body: <p>I am currently following <a href="https://scotch.io/tutorials/authenticate-a-node-js-api-with-json-web-tokens" rel="nofollow">https://scotch.io/tutorials/authenticate-a-node-js-api-with-json-web-tokens</a>. However, I do not understand the need for ...</p>
  
  <pre><code>app.set('superSecret', config.secret);
  </code></pre>
  
  <p>... when you could just continue using <code>config.secret</code>. Can someone kindly explain this to me? Much appreciated.</p>