add cron service to obtain oauth token and store it to the DB

cronServices/oauth.js

@@ -0,0 +1,8 @@
+'use strict';
+
+const { refreshOauthToken } = require('../services/officeRnD/oauth');
+
+refreshOauthToken().then(() => process.exit()).catch((error) => {
+    console.log(error);
+    process.exit();
+});