Hello - newbie here. I am currently evaluating Hubspot for our needs and am connecting my contacts to a Wordpress website via the Contacts API. Using the code, here - https://developers.hubspot.com/docs/methods/contacts/create_contact , I'm able to create a new contact in Hubspot via Wordpress but only the first name, last name and email fields get populated via the API. I've tried everything to get other fields to populate. I assume this is because of limitations on the free account?