curl --request GET \
  --url https://upay-sistema-api.onrender.com/api/user/fees \
  --header 'API-Key: <api-key>'

{
  "success": true,
  "message": "Taxas do usuário recuperadas com sucesso",
  "data": {
    "userId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "pix": {
      "fixed": "0,00",
      "variable": "0,99",
      "fixedCents": 0,
      "variablePercent": 0.99
    },
    "boleto": {
      "fixed": "3,99",
      "variable": "0,00",
      "fixedCents": 399,
      "variablePercent": 0
    },
    "card": {
      "fixed": "3,99",
      "variable": "5,99",
      "fixedCents": 399,
      "variablePercent": 5.99,
      "installments": {
        "2": "14,99",
        "3": "16,49",
        "12": "29,99"
      }
    },
    "isDefault": false
  }
}