Swagger3 Authentication is not generated correctly

[lindgrenfredrik]

#9786 ### Description

Swagger3 code generator has removed authMethod section for each Operation that was available in swagger2
There is a general AuthMethod section but for oauth2 it contains all scopes so it can't be used when generating scope checks for specific operations

Swagger-codegen version

Tested with 3.0.13 & 2.4.8 so see the difference

Swagger declaration file content or url

Swagger2 & 3 files to reproduce the problem:
https://gist.github.com/lindgrenfredrik/0eb76d8ee2cac7066bfefd914632a635

Command line used for generation

java -jar -DdebugOperations=True swagger-codegen-cli.jar generate -l jaxrs-resteasy -i pet_example_2_0.json -o tmp2

java -jar -DdebugOperations=True swagger-codegen-cli-3.0.13.jar generate -l jaxrs-resteasy -i pet_example_3_0.yaml -o tmp3

[lindgrenfredrik]

For some reason part of the text I wrote was lost:

Steps to reproduce

Run commands from Command line section

See src/gen/java/io/swagger/api/PetApi.java and search for scopes to see diff

Note this is not only a template issue, scope group per operation isn't available

Suggest a fix/enhancement

Issues seems to have occurred as part of refactoring of processOperation function in DefaultGenerator.java
It seems that authMethod being set there is not getting same value as it was in swagger2

[lindgrenfredrik]

might be duplicate of this defect
#9498

[ashish211985]

has this issue been resolved .. i m trying to add OAuth2 scopes using OpenApi 3.0 but when the server stub is getting generated all the scopes are getting attached to all the operation functions. Using spring & java ? @lindgrenfredrik

[lindgrenfredrik]

Haven't followed up this since we choose to move over to openapi gen instead which didn't exhibit this issue, so no clue if someone has fixed this issue in Swagger3