private static void RegisterDasNotifications(IServiceCollection services, IConfiguration configuration)
        {
            var notificationsConfig = new NotificationsApiClientConfiguration();

            configuration.GetSection(nameof(NotificationsApiClientConfiguration)).Bind(notificationsConfig);

            var jwtToken = new JwtBearerTokenGenerator(notificationsConfig);

            var httpClient = new HttpClientBuilder()
                             .WithBearerAuthorisationHeader(jwtToken)
                             .WithDefaultHeaders()
                             .Build();

            services.AddTransient <INotificationsApi>(sp => new NotificationsApi(httpClient, notificationsConfig));
        }
        private static void SendEmail()
        {
            //var apiBaseUrl = "https://at-notifications.apprenticeships.sfa.bis.gov.uk/";
            var apiBaseUrl = Configuration.NotificationsApiClientConfiguration.ApiBaseUrl;

            //var token = "<your token>";
            var token = Configuration.NotificationsApiClientConfiguration.ClientToken;

            var config = new NotificationsApiClientConfiguration
            {
                ApiBaseUrl  = apiBaseUrl,
                ClientToken = token
            };

            IGenerateBearerToken jwtToken = new JwtBearerTokenGenerator(config);

            var httpClient = new HttpClientBuilder()
                             .WithBearerAuthorisationHeader(jwtToken)
                             .WithDefaultHeaders()
                             .Build();

            var apiClient = new NotificationsApi(httpClient, config);

            var recipients = Configuration.DefaultEmailAddress;
            var sender     = Configuration.DefaultEmailSenderAddress;
            var replyTo    = Configuration.DefaultEmailReplyToAddress;

            var customFields = new Dictionary <string, string>
            {
                { "UserEmailAddress", sender },
                { "UserFullName", "Test User" },
                { "UserEnquiry", "I have a question" },
                { "UserEnquiryDetails", "Wanted to have different appSettings for debug and release when building your app ? " }
            };

            var c = new Email
            {
                Tokens            = customFields,
                RecipientsAddress = recipients,
                ReplyToAddress    = replyTo,
                SystemId          = "xyz",
                TemplateId        = "VacancyService_CandidateContactUsMessage",
                Subject           = "hello"
            };

            apiClient.SendEmail(c).Wait();
        }