Need `authorize_params` in oauth2_generic

Currently I am in need for authorize_params key in oauth2_generic provider, as seen in this example from https://docs.gitlab.com/ee/integration/oauth2_generic.html#configure-the-oauth-20-provider

gitlab_rails['omniauth_providers'] = [
  {
    name: "oauth2_generic",
    label: "Provider name", # optional label for login button, defaults to "Oauth2 Generic"
    app_id: "<your_app_client_id>",
    app_secret: "<your_app_client_secret>",
    args: {
      client_options: {
        site: "<your_auth_server_url>",
        user_info_url: "/oauth2/v1/userinfo",
        authorize_url: "/oauth2/v1/authorize",
        token_url: "/oauth2/v1/token"
      },
      user_response_structure: {
        root_path: [],
        id_path: ["sub"],
        attributes: {
          email: "email",
          name: "name"
        }
      },
      authorize_params: { --------------> this
        scope: "openid profile email"
      },
      strategy_class: "OmniAuth::Strategies::OAuth2Generic"
    }
  }
]

1. I have tried to inject it using "sed inplace in specific line number" before /sbin/entrypoint.sh but I can't seems to find the key for oauth2_generic in gitlab.yaml inside container.

2. And currently I am trying to build the image from source, but it took so long 😅 .

3. I also tried to volume mount the gitlab.yml with

     volumes:
     - ./.dockerdata/gitlab:/home/git/data:Z
     - $PWD/gitlab.yml:/home/git/gitlab/config/gitlab.yml

but got this sed: cannot rename /home/git/gitlab/config/sedgfJOQv: Device or resource busy

Any suggestion ?

Start with /sbin/entrypoint.sh and inspect how the oauth2_generic provider is generated in gitlab.yml or /home/git/gitlab/config/gitlab.yml. Reproduce the configuration path and the volume-mount error before tracing where provider arguments are assembled. Done means authorize_params can be configured without editing the container manually or triggering the reported rename error.