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

{
  "data": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "type": "phone_number",
      "attributes": {
        "label": "home",
        "phone_number": "+14155559012",
        "effective_from": "2023-12-25",
        "custom_fields": {},
        "external_id": "EXT-12345",
        "effective_to": "2023-12-25"
      },
      "relationships": {
        "user": {
          "links": {
            "related": "<string>"
          },
          "meta": {},
          "data": {
            "type": "user",
            "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
          }
        },
        "profile": {
          "links": {
            "related": "<string>"
          },
          "meta": {},
          "data": {
            "type": "profile",
            "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
          }
        }
      }
    }
  ],
  "meta": {
    "page": {
      "size": 123
    },
    "total": 123
  },
  "links": {
    "self": "<string>",
    "first": "<string>",
    "next": "<string>",
    "prev": "<string>",
    "last": "<string>"
  }
}