curl --request GET \
  --url https://sandbox.api.fin.com/v2/transactions/{transaction_id} \
  --header 'Authorization: Bearer <token>'

const url = 'https://sandbox.api.fin.com/v2/transactions/{transaction_id}';
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/v2/transactions/{transaction_id}")
  .header("Authorization", "Bearer <token>")
  .asString();

import requests

url = "https://sandbox.api.fin.com/v2/transactions/{transaction_id}"

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/v2/transactions/{transaction_id}"

	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))

}