public void Register(IComposerHost host)
{
ComposerConfig.RegisterConfigurations();
host.RegisterControllers(GetType().Assembly);
host.RegisterApiControllers(GetType().Assembly);
host.RegisterExceptionFiltersForApiControllers(typeof(AggregatedComposerExceptionFilter), typeof(ComposerExceptionFilter));
host.MetadataRegistry.LoadViewModelMetadataInAssemblyOf(GetType().Assembly);
RegisterPaymentProviders();
}