public FeatureToggleService(IFeatureToggleConfiguration configuration, ILogger <FeatureToggleService> logger)
{
var store = DynamoDBComponents.DynamoDBFeatureStore(configuration.TableName)
.WithCaching(FeatureStoreCacheConfig.Enabled.WithTtlSeconds(configuration.CacheDurationInSeconds));
var ldConfig = new LaunchDarkly.Client.Configuration()
.WithFeatureStoreFactory(store).WithOffline(true);
_ldClient = new LdClient(ldConfig);
_logger = logger;
}