curl --request GET \
  --url https://prod.featherhq.com/api/v1/phone-numbers \
  --header 'X-API-Key: <api-key>'

{
  "phoneNumbers": [
    {
      "id": "<string>",
      "phoneNumber": "<string>",
      "city": "<string>",
      "state": "<string>",
      "country": "<string>",
      "inboundAgent": {
        "agentId": "<string>",
        "agentName": "<string>"
      },
      "outboundAgents": [
        {
          "agentId": "<string>",
          "agentName": "<string>"
        }
      ],
      "createdAt": "<string>",
      "updatedAt": "<string>"
    }
  ]
}