Owin Add role during registration page

Use the code manager.AddToRole to add role during registration

 if (result.Succeeded)

            {

                // For more information on how to enable account confirmation and password reset please visit http://go.microsoft.com/fwlink/?LinkID=320771

                string code = manager.GenerateEmailConfirmationToken(user.Id);

                string callbackUrl = IdentityHelper.GetUserConfirmationRedirectUrl(code, user.Id, Request);

                manager.AddToRole(user.Id, "Hr");