curl --request GET \
  --url https://sandbox.api.fin.com/v1/beneficiaries/countries \
  --header 'Authorization: Bearer <token>'

const url = 'https://sandbox.api.fin.com/v1/beneficiaries/countries';
const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

fetch(url, options)
  .then(res => res.json())
  .then(json => console.log(json))
  .catch(err => console.error(err));

HttpResponse<String> response = Unirest.get("https://sandbox.api.fin.com/v1/beneficiaries/countries")
  .header("Authorization", "Bearer <token>")
  .asString();

import requests

url = "https://sandbox.api.fin.com/v1/beneficiaries/countries"

headers = {"Authorization": "Bearer <token>"}

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

print(response.text)

package main

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

func main() {

	url := "https://sandbox.api.fin.com/v1/beneficiaries/countries"

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

	req.Header.Add("Authorization", "Bearer <token>")

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

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

	fmt.Println(string(body))

}

{
  "data": [
    {
      "id": 4,
      "code": "AUS",
      "name": "Australia",
      "currency_code": "AUD",
      "phone": {
        "code": "+61",
        "max_length": 9,
        "min_length": 9
      },
      "available_methods": [
        "BANK"
      ],
      "flag": "https://flagcdn.com/au.svg"
    }
  ]
}

{
  "message": "Authentication failed"
}