code: function SharedKey(storageAccount, storageAccessKey) {
    this.storageAccount = storageAccount;
    this.storageAccessKey = storageAccessKey;
    this.signer = new HmacSha256Sign(storageAccessKey);
  }
docs: Creates a new SharedKey object.
  
  @constructor
  @param {string} storageAccount    The storage account.
  @param {string} storageAccessKey  The storage account's access key.