create custom API instance for OAUTH token request

helpers/oauthApi.js

@@ -0,0 +1,15 @@
+'use strict';
+
+require('dotenv').config();
+const axios = require('axios');
+
+const OAUTHUrl = process.env.ORD_OAUTH_URL;
+
+const OAuthAPI = axios.create({
+    baseURL: OAUTHUrl,
+    headers: {'Content-Type': 'application/x-www-form-urlencoded'},
+});
+
+module.exports = {
+    OAuthAPI,
+};