def remove_account_alias(self, account, alias):
        """
        :param account:  an account object to be used as a selector
        :param alias:     email alias address
        :returns:         None (the API itself returns nothing)
        """
        self.request('RemoveAccountAlias', {
            'id': self._get_or_fetch_id(account, self.get_account),
            'alias': alias,
        })