title: User session time out in rails 4
body: <p>How to do user session time out in <code>rails 4</code>. I didn't use any gem for authentication. I do my authentication manually. Any Idea please. I have already tried following and it is not working.</p>
  
  <p>in my <code>session_store.r</code>b file, i added.</p>
  
  <p><code>key: '_Matchimi_session'</code>, 
  <code>expire_after: 1.minutes</code></p>