- Go to Google Developers Console and connect with your Google account
- Click Create project and give it a name
- Once the process is finished, click on the newly created project
- Go to APIS & AUTH / Credentials
- Click Create new Client ID
- Give your domain name as Authorized Javascript origins and the above Callback URL as Authorized redirect URI
- Now copy the Client ID and the Client Secret to Google2Piwigo configuration
- You're done!