Go how to use cookiejar for multiple requests? - authentication

Question

I'm trying to make a cli for a site that has csrf, needing the csrf token to be sent on headers and on a form.
I can't seem to understand net/http.Client or net/http/cookieJar
This its even good practice? There's a better way of doing csrf login on Go ?
Thx in advance ^v^
This its my code:
package main
import (
"fmt"
"log"
"net/http"
"net/http/cookiejar"
"net/url"
"strings"
"time"
)
var (
httpClient = &http.Client{}
)
func main() {
jar, err := cookiejar.New(nil)
if err != nil {
log.Fatal(err)
}
httpClient = &http.Client{
Timeout: 30 * time.Second,
Jar: jar,
}
requestURL := "https://example.com/"
res, err := httpClient.Get(requestURL)
if err != nil {
log.Fatal(err)
}
log.Println(res.Cookies())
// stdout: cookie as expected
u := &url.URL{}
u.Parse(requestURL)
log.Println(httpClient.Jar.Cookies(u))
// stdout: []
form := make(url.Values)
/* ... */
req, err := http.NewRequest(http.MethodPost, requestURL, strings.NewReader(form.Encode()))
if err != nil {
fmt.Printf("client: could not create request: %s\n", err)
}
res, err = httpClient.Do(req)
if err != nil {
log.Fatal(err)
}
fmt.Println(req)
// stdout: cookie as expected
}