2. Then click on Select a Project dropdown and select create a project for your app.
3. Go to Credentials under API & auth .
4. Then click on OAuth consent screen and fill the product name. and Click on the Save button.
5. Go to Credentials under APIs & auth. Click on Add Credentials.Select OAuth 2.0 client ID
Click on Create.
7. Client ID and Client secret will be displayed. Copy the Google generated Client ID and Secret and insert and save them on this page under "Insert Google Client ID and Client Secret".