public SenderMessageHandler(HttpClient httpClient)
{
            _httpClient = httpClient;
}

            
            WebRequestHandler webHandler = new WebRequestHandler();
            X509Certificate2 certificate = GetMyX509Certificate();
            webHandler.ClientCertificates.Add(certificate);
            System.Net.ServicePointManager.ServerCertificateValidationCallback = delegate { return true; };

            _httpClient = new HttpClient(webHandler);