code: public Redemption getCouponRedemptionByAccount(final String accountCode) {
          return doGET(Accounts.ACCOUNTS_RESOURCE + "/" + accountCode + Redemption.REDEMPTION_RESOURCE,
                       Redemption.class);
      }
docs: Lookup the first coupon redemption on an account.
  
  @param accountCode recurly account id
  @return the coupon redemption for this account on success, null otherwise