code: public Optional<PartnerAccount> update(long partnerId, PartnerAccount account)
      {
          return HTTP.PUT(String.format("/v2/partners/%d/accounts/%d", partnerId, account.getId()), account, PARTNER_ACCOUNT);
      }
docs: Updates the given account.
  @param partnerId The id of the partner the account belongs to
  @param account The account to update
  @return The account that was updated