static async Task RetrieveNewsTopic(string topic, int articleCount)
{
BingNewsAzure pipeline = new BingNewsAzure(topic);
await pipeline.AnalyzeArticleImages(new List <Article>());
}
static async Task AddNewsTopic(string topic, int articleCount)
{
BingNewsAzure pipeline = new BingNewsAzure(topic);
await pipeline.InsertArticlesForTopic(topic, 2019, articleCount);
}