I have an external form hooked up to Hubspot's API (the plugin is Freeform Pro, for Craft CMS). I'm able to assign form fields to properties, but the Source field is not an option, so all the Contacts created from this form show the source simply as "API".
Is it possible to change this, either on the form side (an additional, hidden field perhaps) or with logic on the Hubspot side (ie any Contacts with a certain property get their source changed to "Website Signup Form").
The site and form in question are here: https://loveyourjob.ca/