title: User.IsInRole return false
body: <p>I 'm using Identity 2 for authentication in mvc 5 web site. In my view i want check the role of the user : </p>
  
  <pre><code>@if(User.IsInRole("Customers"))
  {
    @*do something*@
  }
  </code></pre>
  
  <p>but this always return false, I have already set  <code>&lt;roleManager enabled="true" /&gt;</code> in the web config.
  any help please.</p>