[C#] Cannot set tokenURL, Scope, clientId, or ClientSecret for OATH2

Description

With OATH2 the code generator requires the OATH token to be set manually and does not provide any functions that can retrieve the token from the tokenURL. The code generation needs to be enhanced so that it does not require a Access_Token but instead requires the OATH Secret, id, and scope. When the client has an invalid or expired key the oath token should be refreshed internally by the generated code.

Swagger-codegen version

3.x

Swagger declaration file content or url

https://app.swaggerhub.com/apis/Pointe-Pest-Control/paylocity/2-oas3

Command line used for generation

Visual Studio Code Generation (C#) .netcore

Steps to reproduce

Related issues/PRs

Suggest a fix/enhancement

Support OATH 2 internal so that it is not required to write additional boiler plate to handle obtaining the oath2 access token.

Use the linked SwaggerHub OAS3 declaration as the reproduction input and inspect the Visual Studio Code Generation (C#) .NET Core path first. Compare the generated handling of access tokens with the requested tokenURL, client ID, client secret, and scope inputs; done means generated code can obtain and refresh OAuth2 tokens without caller-written boilerplate.