title: Node.js Express disable automatic session creation
body: <p>If I enable the session feature of express via <code>app.use(express.session({secret: "12345"}));</code> the session cookie is set when the user first hits a page. </p>
  
  <p>How can I disable this behavior and decide manually when to create a cookie, for example after a successful login? I am aware that I could just construct a cookie-header manually, but I would like to stay with express.session. </p>