curl --request GET \
  --url https://api.buildwithchirp.com/v1/organization/apps/{appId}/phone-numbers \
  --header 'Authorization: Bearer <token>'

{
  "phoneNumbers": [
    {
      "phoneNumberId": "ph_2DbBs7GWhGvVNJGrDXr5RG0mBWI",
      "appId": "app_2DbBs7GWhGvVNJGrDXr5RG0mBWI",
      "number": "<string>",
      "numberType": "local",
      "location": "San Francisco, CA",
      "features": [
        "SMS",
        "MMS",
        "Voice"
      ],
      "createdAt": "<string>",
      "updatedAt": "<string>"
    }
  ],
  "totalCount": 123
}