error fix

-node_modules/
\ No newline at end of file
+node_modules/
+API_config.js
\ No newline at end of file

-const client_id = '743DE__EstcaLZzEsO5f';
-const client_secret = 'Y865wTpZ5y';
-
-const line_channel = {
-  channelAccessToken: 'TgqvFO0cHkSMEiRkJhLMCbfNzzO4Yhpdf8Ov+cr4tBPh2teSilW22TfEfTlxMHFBGufqslip3EYSdppQTCAThCEzf4xc6q8YEtPjF66hmyGOpLZoPK41VTWorrkOmBmmqysb11rElm50Wz6kvM/gogdB04t89/1O/w1cDnyilFU=',
-  channelSecret: 'ff1a934d000f5bfa265ed9fe2eedb0e7',
-};
-
-module.exports ={
-    line_channel : line_channel,
-    client_id : client_id,
-    client_secret : client_secret
-}
\ No newline at end of file

@@ -17,10 +17,10 @@ var languagedetect_api_url = 'https://openapi.naver.com/v1/papago/detectLangs';
 const client_id = config.client_id;
 const client_secret = config.client_secret;
 // Line Channel Access Tocken
-const config = config.line_channel;
+const line_access = config.line_channel;
 
 // create LINE SDK client
-const client = new line.Client(config);
+const client = new line.Client(line_access);
 
 // create Express app
 // about Express itself: https://expressjs.com/
@@ -34,7 +34,7 @@ app.get('/', (req, res) => {
 
 // register a webhook handler with middleware
 // about the middleware, please refer to doc
-app.post('/webhook', line.middleware(config), (req, res) => {
+app.post('/webhook', line.middleware(line_access), (req, res) => {
   Promise
     .all(req.body.events.map(event => handleEvent(event)))
     .then((result) => res.json(result))