This line tries to decode the response content as JSON, which is one of the ways this endpoint may be implemented. The other way is that it responds with a JWT, having a Content-Type header of application/jwt;charset=utf-8 and that fails to decode as JSON, as the JWT itself needs to be processed.

Environment details:

• OS: Arch Linux
• Python: 3.10
• Django: 3.2 LTS
• mozilla-django-oidc: 3.0.0

How to reproduce:

• Use an OIDC_OP_USER_ENDPOINT that responds with a JWT
• Authenticate using OIDC
• Observe JSONDecodeError crash