def METHOD_NAME(self):
    """ClickHouse SHALL reject Kerberos authentication if user's realm specified in users.xml
    doesn't match the realm of the principal trying to authenticate.
    """
    ch_nodes = self.context.ch_nodes
    config_path = f"kerberos/configs/{ch_nodes[0].name}/users.d/kerberos-users.xml"
    def modify_file(root):
        krb = root.find('users').find('kerberos_user')
        krb.find('kerberos').find('realm').text = "OTHER.COM"
        return root
    check_wrong_config(node=ch_nodes[0], client=ch_nodes[2], config_path=config_path, modify_file=modify_file,
                       output="Authentication failed")