handle account info update
        https://www.interactivebrokers.com/en/software/api/apiguide/java/updateaccountvalue.htm

def handleAccount(self, msg):
        """
        handle account info update
        https://www.interactivebrokers.com/en/software/api/apiguide/java/updateaccountvalue.htm
        """

        # parse value
        try:
            msg.value = float(msg.value)
        except Exception:
            msg.value = msg.value
            if msg.value in ['true', 'false']:
                msg.value = (msg.value == 'true')

        try:
            # log handler msg
            self.log_msg("account", msg)

            # new account?
            if msg.accountName not in self._accounts.keys():
                self._accounts[msg.accountName] = {}

            # set value
            self._accounts[msg.accountName][msg.key] = msg.value

            # fire callback
            self.ibCallback(caller="handleAccount", msg=msg)
        except Exception:
            pass