List user notification rules

curl --request GET \
  --url https://api.rootly.com/v1/users/{user_id}/notification_rules \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "id": "<string>",
      "type": "user_notification_rules",
      "attributes": {
        "user_id": 123,
        "delay": 123,
        "position": 123,
        "user_email_address_id": "<string>",
        "user_call_number_id": "<string>",
        "user_sms_number_id": "<string>",
        "user_device_id": "<string>",
        "enabled_contact_types": [
          "email"
        ],
        "created_at": "<string>",
        "updated_at": "<string>"
      }
    }
  ],
  "links": {
    "self": "<string>",
    "first": "<string>",
    "prev": "<string>",
    "next": "<string>",
    "last": "<string>"
  }
}