curl --request GET \
  --url https://api.withflex.com/v1/consumer/orders/{id}/letters \
  --header 'Authorization: Bearer <token>'

{
  "letters": [
    {
      "consultation_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "letter_id": "<string>",
      "url": "<string>"
    }
  ]
}