We need to verify the signature of external JWT ID Tokens during Authentication in gluu.
After successful verification, we need to generate gluu tokens by inserting custom claims with data obtained from the verified external ID token.
The [documentation](https://gluu.org/docs/gluu-server/4.0/admin-guide/custom-script/) mentions that we need to use Jython libraries compatible with Python 2.
However, we are unable to find such a library online. All libraries either need Python 3 or they are through CPython.
Please point us to a native gluu / 3rd party jython library we can use.
Also please provide us with any sample scripts that can help us in development.