AttributeError: 'UnicodeDecodeError' object has no attribute 'message'

[41WhiteElephants]

In FIDO2.py there's wrong code raising exception in exception handling block

Current:

Expected:

return HttpResponse(
            simplejson.dumps({"status": "ERR", "message": str(exp)}),
            content_type="application/json",
            status=400
        )

Steps to reproduce:
call fido2_complete_auth endpoint with some random bytes encoded into payload before cbor.encode call

[mkalioby]

Sorry, just saw this, you can add it to your PR.

Thanks