curl --request GET \
  --url https://9dc2c77e6dbf.ngrok-free.app/v1/organization/apps/{appId}/phone-numbers \
  --header 'Authorization: Bearer <token>'

{
  "phoneNumbers": [
    {
      "phoneNumberId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "appId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "number": "<string>",
      "createdAt": "<string>",
      "updatedAt": "<string>"
    }
  ],
  "totalCount": 123
}