How to pull data from monday.com using API in c#. I have tried the following code and it doesn’t work.

            var httpWebRequest1 = (HttpWebRequest)WebRequest.Create("https://api.monday.com/v2/");

            httpWebRequest1.ContentType = "application/json; charset=UTF-8";

            httpWebRequest1.Method = "GET";

            httpWebRequest1.Headers.Add("Authorization", "API Key");

            httpWebRequest1.GetResponse();

            var datapull = @"{""query"":""query {boards (ids: 1234) {name state items{id name column_values{text} }}}""";



             using (var streamWriter = new StreamWriter(httpWebRequest1.GetRequestStream()))

            {

                streamWriter.Write(datapull);

                Console.WriteLine(datapull);

            }



            var httpResponse1 = (HttpWebResponse)httpWebRequest1.GetResponse();



            using (var streamReader = new StreamReader(httpResponse1.GetResponseStream()))

            {

                var result = streamReader.ReadToEnd();

            }

I am encountering the following error when I used the code above.