curl --request GET \
  --url https://api.despezzas.com/v2/business/dre-mapping \
  --header 'Authorization: Basic <encoded-value>'

const options = {method: 'GET', headers: {Authorization: 'Basic <encoded-value>'}};

fetch('https://api.despezzas.com/v2/business/dre-mapping', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.despezzas.com/v2/business/dre-mapping"

headers = {"Authorization": "Basic <encoded-value>"}

response = requests.get(url, headers=headers)

print(response.text)

package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://api.despezzas.com/v2/business/dre-mapping"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("Authorization", "Basic <encoded-value>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

[
  {
    "category_id": "b1a2c3d4-e5f6-4a7b-8c9d-0e1f2a3b4c5d",
    "category_name": "Fornecedores",
    "dre_group": "custos",
    "is_system": false,
    "source": "mapping"
  }
]

{
  "message": "Credenciais de API inválidas",
  "statusCode": 401,
  "error": "Unauthorized"
}

{
  "message": "Credenciais de API inválidas",
  "statusCode": 401,
  "error": "Unauthorized"
}

{
  "message": "Credenciais de API inválidas",
  "statusCode": 401,
  "error": "Unauthorized"
}