[REQ] Python client will not allow request auth overrides in

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?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

Currently, if the openapi spec doesn't define auth for an endpoint, the users won't be able to set custom auth on individual requests via _request_auths.

This is due to this line:

https://github.com/OpenAPITools/openapi-generator/blob/3501771a2e001fb4dafeed50abcaecc69b164512/modules/openapi-generator/src/main/resources/python/api_client.handlebars#L1236-L1237

openapi-generator version

v6.2.0

OpenAPI declaration file content or url

This is an endpoint from petstore.yaml that will have this issue. The only difference with the original endpoint is that security: keys are removed.

paths:
  /pet:
    post:
      tags:
        - pet
      summary: Add a new pet to the store
      description: ''
      operationId: addPet
      responses:
        '200':
          description: successful operation
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/Pet'
            application/json:
              schema:
                $ref: '#/components/schemas/Pet'
        '405':
          description: Invalid input
      requestBody:
        $ref: '#/components/requestBodies/Pet'
    put:
      tags:
        - pet
      summary: Update an existing pet
      description: ''
      operationId: updatePet
      responses:
        '200':
          description: successful operation
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/Pet'
            application/json:
              schema:
                $ref: '#/components/schemas/Pet'
        '400':
          description: Invalid ID supplied
        '404':
          description: Pet not found
        '405':
          description: Validation exception
      requestBody:
        $ref: '#/components/requestBodies/Pet'

Generation Details

This happens when python is used as the template, irrespective of the config.

Steps to reproduce

This line looks like it would respect the custom auth settings, judging by api_client.py:

api_response = api_instance.v3_my_endpoint(endpoint_body, _request_auths=[{'in':'header', 'type': 'bearer', 'key': 'Authorization', 'value': f"Bearer {TOKEN}"}])

However, the request will still be sent without any auth settings, no exceptions thrown.

Related issues/PRs

Start in modules/openapi-generator/src/main/resources/python/api_client.handlebars at the linked lines, then compare the generated api_client.py behavior with the endpoint methods that accept _request_auths. Reproduce with the provided petstore.yaml endpoint lacking security settings. Done means request-level authentication is honored for such endpoints, with regression coverage for the demonstrated call.