public ElasticEmailSender(
     IElasticEmailOptionsProvider optionsProvider,
     ILogger <ElasticEmailSender> logger
     )
 {
     _optionsProvider = optionsProvider;
     _log             = logger;
 }
 public ElasticEmailSender(
     IElasticEmailOptionsProvider optionsProvider,
     IServiceClientProvider httpClientFactory,
     ILogger <ElasticEmailSender> logger
     )
 {
     _optionsProvider   = optionsProvider;
     _httpClientFactory = httpClientFactory;
     _log = logger;
 }