title: plural/singular controller name
body: <p>I know that using plural for controllers name is the right way in Ruby, but in some cases using singular for controllers name is more appropriately. For example</p>
  
  <pre><code>http://foobar.com/admin/login/
  http://foobar.com/admin/dashboard/
  http://foobar.com/profile/
  </code></pre>
  
  <p>I think you get what I mean.
  So which are the best practices of using singular for controllers names ?</p>
  
  <p>Any example will be appreciated !</p>