in workshop/dotnet/Core.Utilities/Services/StocksService.cs [31:38]
public async Task<Stock> GetStockDailyOpenClose(string symbol, DateTime? date = null)
{
//Default to yesterday's date if no date is provided as current day pricing requires premium subscription
string dateFormatted = date?.ToString("yyyy-MM-dd") ?? DateTime.Now.AddDays(-1).ToString("yyyy-MM-dd");
var requestUri = $"open-close/{symbol}/{dateFormatted}?adjusted=true&apiKey={_apiKey}";
Stock stock = await GetHttpResponse<Stock>(requestUri);
return stock;
}