Revoke cluster administration privileges from a user.

        :param username: the username to revoke privileges from
        :type username: str

        .. note:: Only a cluster administrator can create/ drop databases
            and manage users.

def revoke_admin_privileges(self, username):
        """Revoke cluster administration privileges from a user.

        :param username: the username to revoke privileges from
        :type username: str

        .. note:: Only a cluster administrator can create/ drop databases
            and manage users.
        """
        text = "REVOKE ALL PRIVILEGES FROM {0}".format(quote_ident(username))
        self.query(text, method="POST")