curl -X POST "https://app.talkover.ai/api/v1/sip-trunks/trunk-uuid-1/dids" \
  -H "Authorization: Bearer talq_your_environment_token_here" \
  -H "Content-Type: application/json" \
  -d '{
    "country_code": "US",
    "number": "+15551234567"
  }'

{
  "success": true,
  "data": {
    "id": "phone-uuid-1",
    "number": "+15551234567",
    "country_code": "US",
    "formatted_number": "(555) 123-4567",
    "trunk_id": "trunk-uuid-1"
  }
}

{
  "success": false,
  "message": "This number is already registered in your environment",
  "code": "DID_ALREADY_EXISTS"
}