public CloudBlobFactory(BlobConfig config)
 {
     this._config = config;
 }
 /// <summary>
 /// Configuration constructor
 /// </summary>
 /// <param name="configuration"></param>
 public DataProtectionConfig(IConfiguration configuration) :
     base(configuration)
 {
     _stg = new BlobConfig(configuration);
     _kv  = new KeyVaultConfig(configuration);
 }