BeerDrinkin.Startup.ConfigureMobileApp C# (CSharp) Method

        public static void ConfigureMobileApp(IAppBuilder app)
        {
            HttpConfiguration config = new HttpConfiguration();

            new MobileAppConfiguration()
                .UseDefaultConfiguration()
                .ApplyTo(config);

            // Use Entity Framework Code First to create database tables based on your DbContext
            MobileAppSettingsDictionary settings = config.GetMobileAppSettingsProvider().GetMobileAppSettings();

            if (string.IsNullOrEmpty(settings.HostName))
            {
                app.UseAppServiceAuthentication(new AppServiceAuthenticationOptions
                {
                    // This middleware is intended to be used locally for debugging. By default, HostName will
                    // only have a value when running in an App Service application.
                    SigningKey = ConfigurationManager.AppSettings["SigningKey"],
                    ValidAudiences = new[] { ConfigurationManager.AppSettings["ValidAudience"] },
                    ValidIssuers = new[] { ConfigurationManager.AppSettings["ValidIssuer"] },
                    TokenHandler = config.GetAppServiceTokenHandler()
                });
               
            }            
            app.UseWebApi(config);
            ConfigureSwagger(config);
        }