feat: intialize google oauth flow

server/src/routes/auth.ts

@@ -1,6 +1,24 @@
-import { Router } from 'express';
-export const router = Router();
+import { Router } from 'express';;
+import { google } from "googleapis";
+import { OAuth2Client } from 'google-auth-library'
 
-router.post('/auth/google', (req, res) => {	
-    res.send('Google auth');
+export const router = Router()
+
+const oauth2Client = new OAuth2Client(
+    '_CLIENT_ID',
+    '_CLIENT_SECRET',
+    '_REDIRECT_URI'
+);
+
+// initialize Google OAuth 2.0 flow
+router.get('/auth/google', (req, res) => {
+  const url = oauth2Client.generateAuthUrl({
+    access_type: 'offline',
+    scope: [
+      'https://www.googleapis.com/auth/userinfo.profile',
+      'https://www.googleapis.com/auth/drive.file',
+      'https://www.googleapis.com/auth/spreadsheets'
+    ]
+  });
+  res.redirect(url);
 });