add comment

config/index.js

@@ -8,7 +8,8 @@ module.exports = {
     redirect_uri: process.env.REDIRECT_URI || '',
     client_id: process.env.CLIENT_ID || '',
     secret: process.env.SECRET || '',
-    refresh_token: process.env.REFRESH_TOKEN || ''
+    refresh_token: process.env.REFRESH_TOKEN || '',
+    bot_account: process.env.BOT_ACCOUNT || ''
   },
   database: {
     host: process.env.DB_HOST || 'localhost',