public static IAppBuilder UseFederationAuthentication(this IAppBuilder app, Action<FederationAuthenticationOptions> configuration)
 {
     var options = new FederationAuthenticationOptions();
     configuration(options);
     return UseFederationAuthentication(app, options);
 }
 public static IAppBuilder UseFederationAuthentication(this IAppBuilder app, FederationAuthenticationOptions options)
 {
     app.Use(typeof(FederationAuthenticationMiddleware), options);
     return app;
 }