Returns detailed information about a specific contact.
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
The WhatsApp instance UUID
"a1b2c3d4-e5f6-7890-abcd-ef1234567890"
Contact ID (e.g., [email protected])
Contact details
Contact WhatsApp ID
Push name set by the contact
"John"
Contact name from address book
"John Doe"