title: Cannot insert the value NULL into column 'Discriminator' AspNetUsers Table
body: <p>After a code first migration, adding a user using the register fails with:</p>
  
  <blockquote>
    <p>Cannot insert the value NULL into column 'Discriminator', table 'aspnet-BSF2013-20130918101120.dbo.AspNetUsers'; column does not allow nulls.</p>
  </blockquote>
  
  <p>The create user code is the default code generated by the Project Template (Vs2013, MVC project with EF5)</p>
  
  <p>Before a successful migration, the Registration code worked, so I'm guessing that membership has been altered by EF.</p>