상속: Microsoft.Owin.Security.AuthenticationOptions
        public static IAppBuilder UseFoursquareAuthentication(this IAppBuilder app, FoursquareAuthenticationOptions options)
        {
            if (app == null)
            {
                throw new ArgumentNullException("app");
            }
            if (options == null)
            {
                throw new ArgumentNullException("options");
            }

            app.Use(typeof(FoursquareAuthenticationMiddleware), app, options);
            return app;
        }
 private static void SetupFourSquareAuth(IAppBuilder app)
 {
     FoursquareAuthenticationOptions fourSquareOptions = new FoursquareAuthenticationOptions()
     {
         ClientId = FourSquareClientId,
         ClientSecret = FourSquareClientSecret
     };
     app.UseFoursquareAuthentication(fourSquareOptions);
 }