title: Mongodb session store in Expressjs 4
body: <p>In express 3 I use <code>connect-mongo</code> for session store.</p>
  
  <pre><code>var mongoStore = require('connect-mongo')(express);
  </code></pre>
  
  <p>But after I switched to express 4 it doesn't work. I got this error:</p>
  
  <pre><code>Error: Most middleware (like session) is no longer bundled with Express and must be       installed separately. Please see https://github.com/senchalabs/connect#middleware.
  </code></pre>
  
  <p>I see connect has been removed from express 4. How can I continue use this or are there any good libs that I can use for express 4. Thanks.</p>