I\'m trying to use the new MVC5 framework in VS 2013 preview.
The membership authentication framework has been overhauled and replaced with OWin.
With RTW version of asp.net identity the following code in ExternalLoginCallback does that for me.
var externalIdentity = await HttpContext.GetOwinContext().Authentication
.GetExternalIdentityAsync(DefaultAuthenticationTypes.ExternalCookie);
var displayName = externalIdentity.Name;
var email = externalIdentity.FindFirstValue(ClaimTypes.Email);