curl --request GET \
  --url https://api.steppay.kr/api/v1/customers \
  --header 'Secret-Token: <api-key>'

import requests

url = "https://api.steppay.kr/api/v1/customers"

headers = {"Secret-Token": "<api-key>"}

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

print(response.text)

const options = {method: 'GET', headers: {'Secret-Token': '<api-key>'}};

fetch('https://api.steppay.kr/api/v1/customers', 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://api.steppay.kr/api/v1/customers",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "Secret-Token: <api-key>"
  ],
]);

$response = curl_exec($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://api.steppay.kr/api/v1/customers"

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

	req.Header.Add("Secret-Token", "<api-key>")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.get("https://api.steppay.kr/api/v1/customers")
  .header("Secret-Token", "<api-key>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.steppay.kr/api/v1/customers")

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

request = Net::HTTP::Get.new(url)
request["Secret-Token"] = '<api-key>'

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

{
  "content": [
    {
      "id": 1,
      "code": "customer_AbCdEfGhI",
      "status": "NORMAL",
      "username": "test1@gmail.com",
      "name": "테스트 고객",
      "email": "test1@gmail.com",
      "phone": "01012345678",
      "orderCount": 0,
      "activeSubscriptionCount": 0,
      "paymentMethods": [],
      "marketingSms": false,
      "marketingEmail": false,
      "marketingKakao": false,
      "createdAt": "9999-01-01T00:00:00",
      "dormantAt": null,
      "customFields": {},
      "countryCode": "KR"
    },
    {
      "id": 1,
      "code": "customer_AbCdEfGhI",
      "status": "NORMAL",
      "username": "test2@gmail.com",
      "name": "테스트 고객2",
      "email": "test2@gmail.com",
      "phone": "01011231123",
      "orderCount": 1,
      "activeSubscriptionCount": 0,
      "paymentMethods": [
        {
          "id": 1,
          "paymentInfo": "XX카드 111111**********"
        }
      ],
      "marketingSms": false,
      "marketingEmail": false,
      "marketingKakao": false,
      "createdAt": "9999-01-01T00:00:00",
      "dormantAt": null,
      "customFields": {},
      "countryCode": "UNKNOWN"
    }
  ],
  "pageable": {
    "page": 0,
    "size": 20,
    "sortDir": "DESC",
    "sort": "createdAt",
    "pageSize": 20,
    "pageNumber": 0,
    "offset": 0,
    "paged": true,
    "unpaged": false
  },
  "last": true,
  "totalElements": 2,
  "totalPages": 1,
  "sort": {
    "unsorted": false,
    "sorted": true,
    "empty": false
  },
  "number": 0,
  "first": true,
  "numberOfElements": 20,
  "size": 20,
  "empty": false
}

{
  "errorCode": "<string>",
  "traceId": "<string>",
  "errorMessage": "<string>",
  "details": {}
}

{
  "errorCode": "<string>",
  "traceId": "<string>",
  "errorMessage": "<string>",
  "details": {}
}