public X509Certificate2 GetValidCertificateFromEmbeddedResource()
        {
            const string testPwd       = "";
            const string demoPwd       = "";
            const string productionPwd = "";

            if (_applicationConfiguration.GetCurrentEnvironment() == AppEnvironmentEnum.Test)
            {
                var testApplicationCertificate = new X509Certificate2("", testPwd);

                LogExtraInformation(
                    "",
                    testApplicationCertificate,
                    testPwd,
                    CertificateTypeEnum.TestApplication
                    );

                certificate = testApplicationCertificate;
            }
            else if (_applicationConfiguration.GetCurrentEnvironment() == AppEnvironmentEnum.Demo)
            {
                var demoApplicationCertificate = new X509Certificate2("", demoPwd);

                LogExtraInformation(
                    "",
                    demoApplicationCertificate,
                    demoPwd,
                    CertificateTypeEnum.DemoApplication
                    );

                certificate = demoApplicationCertificate;
            }
            else if (_applicationConfiguration.GetCurrentEnvironment() == AppEnvironmentEnum.Production)
            {
                _errorLog.LogInfo(
                    this,
                    string.Format("APP_CERT_PRE_FETCH_CHECK", certificate == null)
                    );

                X509Certificate2 productionApplicationCertificate = null;

                try
                {
                    _errorLog.LogInfo(this,
                                      string.Format("APP_CERT_LENGTH_OF_EMBEDDED_RESOURCE", ""?.Length)
                                      );

                    productionApplicationCertificate = new X509Certificate2("", productionPwd);
                }
                catch (Exception certificateException)
                {
                    _errorLog.LogFatal(this, certificateException.Message, certificateException);
                }

                _errorLog.LogInfo(
                    this,
                    string.Format("APP_CERT_GOT_CERT_FROM_EMBEDDED_RESOURCE",
                                  productionApplicationCertificate?.SubjectName.Name)
                    );

                certificate = productionApplicationCertificate;
            }

            // deal breaker....
            if (certificate == null)
            {
                throw new NoNullAllowedException(nameof(certificate));
            }


            if (_applicationConfiguration.ShouldVerifyCertificateExpirationDate())
            {
                var validationResult = VerifyCertificateExpirationDate(certificate, CertificateTypeEnum.Application);
            }

            return(certificate);
        }