title: How is SimpleMembershipProvider wired in MVC4
body: <p>We created a CustomSimpleMembershipProvider in a asp.net mvc4 internet template like so</p>
  
  <pre><code>public class MySimpleMembershipProvider : SimpleMembershipProvider    {
      public override bool RequiresUniqueEmail        {
          get            {                return true;            }
      }
  }
  </code></pre>
  
  <p>But using this seems to be a mystery as</p>
  
  <ul>
  <li>there's no web.config entry</li>
  <li>there are no references to SimpleMembershipProvider in 
    InitializeSimpleMembershipAttribute or
    SimpleMembershipInitializer<br>
   so can't change it there</li>
  </ul>
  
  <p>so the question is - where is the wiring for SimpleMembershipProvider in asp.net mvc4 and how to change it ?</p>