seperated config

+node_modules/

 var express = require('express');
 var app = express();
 const line = require('@line/bot-sdk');
+const config = require('./config');
 
 
 //papago api
@@ -12,19 +13,10 @@ var translate_api_url = 'https://openapi.naver.com/v1/papago/n2mt';
 //언어감지 api_url
 var languagedetect_api_url = 'https://openapi.naver.com/v1/papago/detectLangs'
 
-// Naver Auth Key
-//새로 발급받은 naver papago api id, pw 입력
-var client_id = 'xZMx34y7uru1v8lywZ2d';
-var client_secret = 'p6L7M7WsH9';
-
-const config = {
-  channelAccessToken: 'mnny0MJSezgBXzR9C3Ddcc1Csdb7Y9jkvy2nqV5saOmvR2YOJ1/kj/2M0CNsLA+57B2qDpdUQ7WbCTtIKx/LAJ6Kwfop4tX3up7EM8H9EZK1td6GMbhhCb6wvUFVdb1PcTO4joCv8mspd3ubo8a+gAdB04t89/1O/w1cDnyilFU=',
-  channelSecret: 'bde77633a16fc5bfbd532d5990c6170e',
-};
 
 
 // create LINE SDK client
-const client = new line.Client(config);
+const client = new line.Client(config.line_config);
 
 // create Express app
 // about Express itself: https://expressjs.com/
@@ -52,7 +44,7 @@ function handleEvent(event) {
     var detect_options = {
       url : languagedetect_api_url,
       form : {'query': event.message.text},
-      headers: {'X-Naver-Client-Id': client_id, 'X-Naver-Client-Secret': client_secret}
+      headers: config.naver_header
     };
 
     //papago 언어 감지
@@ -77,7 +69,7 @@ function handleEvent(event) {
               url:  translate_api_url,
               // 한국어(source : ko), 영어(target: en), 카톡에서 받는 메시지(text)
               form: {'source':source, 'target':target, 'text':event.message.text},
-              headers: {'X-Naver-Client-Id': client_id, 'X-Naver-Client-Secret': client_secret}
+              headers: config.naver_header
           };
 
           // Naver Post API

+// Naver Auth Key
+export const naver_header = {
+    'X-Naver-Client-Id': '', 
+    'X-Naver-Client-Secret': ''
+}
+
+// Line config
+export const line_config = {
+  channelAccessToken: '',
+  channelSecret: '',
+};