Is there a way growthbook to send custom attributes like user_id to GA4 datalayer? We could not find a way how to attach internal "user_id" to growthbook experiment_view entry in GA4 https://docs.growthbook.io/lib/script-tag

Hi Marton, I understand you want to add user_id as a custom attribute. Here is an example:

<script>
window.growthbook_config = window.growthbook_config || {};
window.growthbook_config.attributes = {
    user_id: "xyz",
    otherCustomAttribute: 12,
}
</script>