post https://api.omnisend.com/v4/identify
Create or update a contact matched by id, email or phoneNumber.
OAuth 2.0 scopes: contacts.write.
Creating a new contact
When creating a new contact, either email or phoneNumber is required. Additionally, other properties needed could be set.
Updating a contact
When updating a contact, either id, email or phoneNumber is required to match the existing contact. Additionally, other properties needed could be changed or removed.