public void Configuration(IAppBuilder app)
{
app.CreatePerOwinContext(() => new ShoppingCartContext());
app.CreatePerOwinContext <AppUserManager>(AppUserManager.Create);
app.CreatePerOwinContext <RoleManager <AppRole> >((options, context) =>
new RoleManager <AppRole>(
new RoleStore <AppRole>(ShoppingCartContext.Create())));
app.UseCookieAuthentication(new CookieAuthenticationOptions
{
AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,
LoginPath = new PathString("/Account/Login"),
});
AddUserRoles();
}