docs: def getbalance(self, user_id="", as_decimal=True):
          """Calculate the total balance in all addresses belonging to this user.
  
          Args:
            user_id (str): this user's unique identifier
            as_decimal (bool): balance is returned as a Decimal if True (default)
                               or a string if False
  
          Returns:
            str or Decimal: this account's total coin balance
  
          """
          balance = unicode(self.rpc.call("getbalance", user_id))
          self.logger.debug("\"" + user_id + "\"", self.coin, "balance:", balance)
          if as_decimal:
              return Decimal(balance)
          else:
              return balance