Использовать прокси-сервер с BigQueryClient C #

Question

Как я могу использовать прокси-сервер с BigQueryClient?

Вот пример кода: -

var fs = new FileStream(_BQConn.JSONKeyFileName, FileMode.Open);
GoogleCredential googlecreds = GoogleCredential.FromStream(fs);
BigQueryClient client = BigQueryClient.Create(_BQConn.ProjectId, googlecreds);
Task<BigQueryResults> TaskData = client.ExecuteQueryAsync(Query,null,null , null);
BigQueryResults data = await TaskData;