ClickHouse/tests/integration/test_named_collections/configs/users.d/users.xml

<clickhouse>
    <users>
        <default>
            <password></password>
            <networks>
                <ip>::/0</ip>
            </networks>
            <profile>default</profile>
            <quota>default</quota>
            <show_named_collections>1</show_named_collections>
        </default>
    </users>
</clickhouse>