Granite Auth Provider Access token is not understandable from Provided due to encryption

Problem Statement:

We configured OAuth by following steps

• From /system/console/configMgr we Add Provider information with Granite Auth Provider configuration
• We add handler path from Authentication handler
• We add provider information from external login and sync handler

We're currently successfully authenticated by provider. But, the problem is, we're unable to find the JWT token or decrypted token after successful authentication.

Currently we're receiving a encrypted token in cookies.

Target:

1. We need to decrypt the stored cookie
2. We need to find out, how we can get JWT token that provided sending us after authentication

Looking for support and it will really appreciated.

@joerghoh @aanchal-sikka