curl --request GET \
  --url https://{instance}-api.private.fin.ag/v3/{customerId}/BankingServices/GetAccountsSummaryAsync/{requestId} \
  --header 'Content-Type: <content-type>'

import requests

url = "https://{instance}-api.private.fin.ag/v3/{customerId}/BankingServices/GetAccountsSummaryAsync/{requestId}"

headers = {"Content-Type": "<content-type>"}

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

print(response.text)

const options = {method: 'GET', headers: {'Content-Type': '<content-type>'}};

fetch('https://{instance}-api.private.fin.ag/v3/{customerId}/BankingServices/GetAccountsSummaryAsync/{requestId}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://{instance}-api.private.fin.ag/v3/{customerId}/BankingServices/GetAccountsSummaryAsync/{requestId}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "Content-Type: <content-type>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

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

func main() {

	url := "https://{instance}-api.private.fin.ag/v3/{customerId}/BankingServices/GetAccountsSummaryAsync/{requestId}"

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

	req.Header.Add("Content-Type", "<content-type>")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.get("https://{instance}-api.private.fin.ag/v3/{customerId}/BankingServices/GetAccountsSummaryAsync/{requestId}")
  .header("Content-Type", "<content-type>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://{instance}-api.private.fin.ag/v3/{customerId}/BankingServices/GetAccountsSummaryAsync/{requestId}")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Get.new(url)
request["Content-Type"] = '<content-type>'

response = http.request(request)
puts response.read_body

{
  "HttpStatusCode": 123,
  "Accounts": [
    {
      "EftEligibleRatio": 123,
      "ETransferEligibleRatio": 123,
      "Title": "<string>",
      "AccountNumber": "<string>",
      "LastFourDigits": "<string>",
      "Balance": {
        "Available": 123,
        "Current": 123,
        "Limit": "<string>"
      },
      "Category": "<string>",
      "Type": "<string>",
      "Currency": "<string>",
      "Holder": {
        "Name": "<string>",
        "Address": {
          "CivicAddress": "<string>",
          "City": "<string>",
          "Province": "<string>",
          "PostalCode": "<string>",
          "POBox": "<string>",
          "Country": "<string>"
        },
        "Email": "<string>",
        "PhoneNumber": "<string>"
      },
      "Id": "<string>"
    }
  ],
  "Login": {
    "Username": "<string>",
    "IsScheduledRefresh": true,
    "LastRefresh": "<string>",
    "Type": "<string>",
    "Id": "<string>"
  },
  "Institution": "<string>",
  "RequestId": "<string>"
}

{
  "FlinksCode": "OPERATION_PENDING",
  "Links": [
    {
      "rel": "GetAccountsSummaryAsync",
      "href": "/GetAccountsSummaryAsync",
      "example": "/GetAccountsSummaryAsync/077785a3-fd0f-42f7-9251-ee2ff7f3b4ff"
    }
  ],
  "HttpStatusCode": 202,
  "Message": "Your operation is still processing",
  "RequestId": "077785a3-fd0f-42f7-9251-ee2ff7f3b4ff"
}

{
  "HttpStatusCode": 400,
  "Message": "RequestId 1df20baf-65d5-40ee-9be0-8058c13042e2 is invalid or session has ended",
  "FlinksCode": "SESSION_NONEXISTENT"
}