We're trying to figure out how https://developers.hubspot.com/docs/methods/tracking_code_api/identify_visitor works when passed our own employee_id custom property.
What happens if we pass an email and id and there's no contact? Is it created?
What if there is a contact? Are both the email and id associated with the analytics data?
What if we've identified an email and an id before, but now the email has changed while the id is the same. Will identify lookup a contact by the id and update the email on that? Or will it lookup a contact by the email, see there is none (because it's a new email) and try to create a new contact?