private IServiceProvider ConfigureServices(Action <IServiceCollection> addServices = null)
{
var services = new ServiceCollection();
services.AddSingleton(db);
services.AddLogging(builder => builder.AddSerilog(logger));
application.ConfigureDi(services, logger);
application.ConfigureAuthServices(services, FakeWebApiConfiguration);
application.ConfigureMvc(services);
addServices?.Invoke(services);
return(services.BuildServiceProvider());
}