Bitrecife Sign in example

package main

import (
	"crypto/hmac"
	"crypto/sha512"
	"encoding/hex"
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
	"strconv"
	"time"
)

func main() {

	APIKey := ""
	APISecret := ""

	url := "https://exchange.bitrecife.com.br/api/v3/private/getbalances?apikey=" + APIKey + "&nonce=" + strconv.Itoa(int(time.Now().Unix()))

	apisignhmac512 := hmac.New(sha512.New, []byte(APISecret))
	apisignhmac512.Write([]byte(url))
	apisign := hex.EncodeToString(apisignhmac512.Sum(nil))

	req, err := http.NewRequest("GET", url, nil)
	if err != nil {
		log.Println(err)
	}

	req.Header.Set("apisign", apisign)

	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		log.Println(err)
	}

	defer resp.Body.Close()

	response, err := ioutil.ReadAll(resp.Body)

	if err != nil {
		log.Println(err)
	}

	fmt.Println(string(response))

}