curl https://api.thanxsandbox.com/partner/users/:id \
  -X GET \
  -H 'X-ClientId: {client_id}' \
  -H 'Accept-Version: v4.0' \
  -H 'Content-Type: application/json' \
  -H 'Authorization: Bearer {access_token}' \

{
  "user": {
    "id": "wroeiu2304hfwf",
    "email": "john.smith@example.com",
    "phone": "+14158672345",
    "first_name": "Jane",
    "last_name": "Smith",
    "birth_date": {
      "year": 1987,
      "month": 8,
      "day": 14
    },
    "zip_code": "12345",
    "updated_at": "2025-02-01T19:00:00Z",
    "loyalty": {
      "tier": "silver",
      "points_balance": 120.50,
      "user_joined_at": "2023-12-01T19:00:00Z"
    },
    "communication_settings": {
      "marketing_general_email": true
    }
  }
}