/// <summary>
 /// Deletes the call with the given call sid.
 /// </summary>
 /// <param name="callSid">The SID of the Twilio call resource.</param>
 /// <param name="log">A logger instance.</param>
 /// <returns>A Task returning true if successful and false if failed.</returns>
 public async Task <bool> DeleteCallAsync(string callSid, ILogger log)
 {
     log.LogInformation($"Attempting to delete Twilio call resource '{callSid}'...");
     return(await CallResource.DeleteAsync(callSid, client : _twilioClient));
 }