Adds a new contact to the specified organisation. If the contact is already associated with the organisation, the endpoint return its ID.
contact (ContactUpload): The contact details to be uploaded. This includes email, first name, last name, and custom data.X-API-Key: The API key for authentication.400 Bad Request: If the contact is already associated with the organisation.1 - 631 - 631 - 631 - 63161 - 31Successful Response