curl --request GET \
  --url https://api.itellico.ai/v1/accounts/{account_id}/sip-trunks/{sip_trunk_id} \
  --header 'X-API-Key: <api-key>'

{
  "id": "<string>",
  "name": "<string>",
  "phone_numbers": [
    {
      "id": "<string>",
      "number": "<string>",
      "friendly_name": "<string>"
    }
  ],
  "has_auth_password": false,
  "auth_password_length": 123,
  "allowed_ips": [
    "<string>"
  ],
  "termination_uri": "<string>",
  "sip_auth_username": "<string>"
}