curl --request GET \
  --url https://app.kapso.ai/api/v1/whatsapp_contacts/{identifier} \
  --header 'X-API-Key: <api-key>'

{
  "data": {
    "id": "contact-789ghi",
    "wa_id": "1234567890",
    "profile_name": "John Doe",
    "metadata": {},
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z"
  }
}