hass-config/.storage/google_assistant

{
    "version": 1,
    "minor_version": 1,
    "key": "google_assistant",
    "data": {
        "agent_user_ids": {
            "953bb64a-7106-4755-bc10-71d1e7041997": {
                "local_webhook_id": "002beda9aecf1bc66c4410e0c335d5daa0abdc896cfa9b2442d1f14e72598e26"
            }
        }
    }
}