public async Task <IEXResponse <IEnumerable <HolidaysAndTradingDatesUSResponse> > > HolidaysAndTradingDatesUSAsync(
DateType type, DirectionType direction = DirectionType.Next, int last = 1, DateTime?startDate = null)
{
const string urlPattern = "ref-data/us/dates/[type]/[direction]/[last]/[startDate]";
var qsb = new QueryStringBuilder();
var pathNvc = new NameValueCollection
{
{ "type", type.GetDescriptionFromEnum() },
{ "direction", direction.GetDescriptionFromEnum() },
{ "last", last.ToString() },
{ "startDate", startDate == null?DateTime.Now.ToString("yyyyMMdd") : ((DateTime)startDate).ToString("yyyyMMdd") }
};
return(await executor.ExecuteAsync <IEnumerable <HolidaysAndTradingDatesUSResponse> >(urlPattern, pathNvc, qsb));
}