[Chore] update inquiry examples

Author: Palbahngmiyine

examples/javascript/common/src/inquiry/get_balance.js

@@ -1,7 +1,16 @@
 /**
  * 잔액 조회 예제
  */
-const { SolapiMessageService } = require("solapi");
-const messageService = new SolapiMessageService("ENTER_YOUR_API_KEY", "ENTER_YOUR_API_SECRET");
+const {SolapiMessageService} = require('solapi');
+const messageService = new SolapiMessageService(
+  'ENTER_YOUR_API_KEY',
+  'ENTER_YOUR_API_SECRET',
+);
 
-messageService.getBalance().then(res => console.log(res));
+messageService.getBalance().then(res => {
+  // 잔액 조회
+  console.log(res.balance);
+
+  // 포인트 조회
+  console.log(res.point);
+});