public KeyVaultFetchStore(
     KeyVaultFetchStoreOptions <T> options,
     KeyVaultClient keyVaultClient,
     ILogger logger)
 {
     _options        = options;
     _keyVaultClient = keyVaultClient;
     _logger         = logger;
 }
 public SimpleStringKeyVaultFetchStore(
     KeyVaultFetchStoreOptions <string> options, KeyVaultClient keyVaultClient, ILogger logger) :
     base(options, keyVaultClient, logger)
 {
 }