if (validate)
                {
                    var manager = context.OwinContext.GetUserManager<TManager>();
                    var userId = getUserIdCallback(context.Identity);
                    if (manager != null && userId != null)
                    {

 appBuilder.CreatePerOwinContext(() => ProjectObjectFactory.Container.GetInstance<IApplicationUserManager>());

 appBuilder.CreatePerOwinContext(
                () =>ProjectObjectFactory.Container.GetInstance<ApplicationUserManager>());

 app.UseCookieAuthentication(new CookieAuthenticationOptions
        {
            AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,
            LoginPath = new PathString("/Account/Login"),
            Provider = new CookieAuthenticationProvider
            {
                // Enables the application to validate the security stamp when the user logs in.
                // This is a security feature which is used when you change a password or add an external login to your account.  
                OnValidateIdentity = SecurityStampValidator.OnValidateIdentity<ApplicationUserManager, ApplicationUser>(
                    validateInterval: TimeSpan.FromSeconds(0),
                    regenerateIdentity: (manager, user) => user.GenerateUserIdentityAsync(manager))
            }
        });

await UserManager.UpdateSecurityStampAsync(userId);

    total = users.FutureCount();
            var query =
                users.OrderByUserName()
                    .SkipAndTake(search.PageIndex - 1, search.PageSize)
                    .Future().ToList();
            return _mappingEngine.Map<IList<UserViewModel>>(query);