manual:Set up oAuth with google

1. Go to the Google credentials page.
2. Click Create credentials > OAuth client ID.
3. Select the Web application application type.
4. Name your OAuth 2.0 client and click Create.
5. Click on the entry in the table that you have created.
6. Click "Download JSON".
7. Open settings in USOC.
8. Set "Client id" to your "Client id". (without ".apps.googleusercontent.com")
9. Go to the /login folder.
10. Copy your downloaded JSON in there.
11. Rename this file to client_string.json.