Retrieves user phone numbers

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

{
  "data": [
    {
      "id": "f138741b-1831-4f39-8b14-9116573f76f4",
      "type": "user_phone_numbers",
      "attributes": {
        "user_id": 1053,
        "phone": "+14432701741",
        "primary": true,
        "created_at": "2026-01-29T05:31:11.345-08:00",
        "updated_at": "2026-01-29T05:31:11.410-08:00"
      }
    },
    {
      "id": "1d6a1372-9a25-40c0-bd98-60e59129808b",
      "type": "user_phone_numbers",
      "attributes": {
        "user_id": 1053,
        "phone": "+14092108319 x9036",
        "primary": false,
        "created_at": "2026-01-29T05:31:11.364-08:00",
        "updated_at": "2026-01-29T05:31:11.364-08:00"
      }
    }
  ],
  "links": {
    "self": "http://www.example.com/v1/users/1053/phone_numbers?page%5Bnumber%5D=1&page%5Bsize%5D=50",
    "first": "http://www.example.com/v1/users/1053/phone_numbers?page%5Bnumber%5D=1&page%5Bsize%5D=50",
    "prev": null,
    "next": null,
    "last": "http://www.example.com/v1/users/1053/phone_numbers?page%5Bnumber%5D=1&page%5Bsize%5D=50"
  },
  "meta": {
    "current_page": 1,
    "next_page": null,
    "prev_page": null,
    "total_count": 2,
    "total_pages": 1
  }
}