code: public Transactions getAccountTransactions(final String accountCode) {
          return doGET(Accounts.ACCOUNTS_RESOURCE + "/" + accountCode + Transactions.TRANSACTIONS_RESOURCE,
                       Transactions.class, new QueryParams());
      }
docs: Lookup an account's transactions history
  <p>
  Returns the account's transaction history
  
  @param accountCode recurly account id
  @return the transaction history associated with this account on success, null otherwise