OAuth / OIDC Single Sign On

1. Navigate to the Sign in settings tab of the Drupal OAuth Client. In the Base URL text field, you will have to enter your drupal site base url with https. For eg: https://www.xyz.com  and then click on the Save Configuration button.
2. Navigate to Configure OAuth tab. Click on the edit application and review the values and click on the Save Configuration button.

Now, you can try to perform the Test Configuration and SSO on the Drupal site.