Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
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Description

I am generating Python client for my OpenAPI and it is outputting invalid Python code, where it has a Configuration class, which is trying to use self.access_token which is not initialised to any default value.

openapi-generator version

v.4.2.0

OpenAPI declaration file content or url

Generation Details

docker run --rm \
		-v "${PWD}:/repo" openapitools/openapi-generator-cli generate \
		-i /repo/spec.yaml \
		-g python --package-name "my_api" \
		-o /repo/openapi/my_api

Related Issues

#7929

Steps to reproduce

With generated client, just go to configuration.py you will see that self.access_token is being used, though it was not initialised anywhere.

Suggest a fix

Initialise access_token value to None by default