Look Up User By Email
Resolves a user’s user_id from their email address, scoped to your organization. The email is sent in the request body (not the URL) so it never lands in request logs or analytics. Returns the user only when they belong to your organization — either as an organization member (access_type: "organization") or as an explicit member of at least one non-paused website in your organization (access_type: "website"). Any other case, including an email that belongs to a user in a different organization, returns 404 with the same body as a truly unknown email, so the endpoint cannot be used to enumerate accounts across tenants. Requires a global API key. Use the returned user_id with the member-management endpoints (e.g. list a user’s websites or remove website access) without a discovery round-trip.