Improve openapi3filter HTTP Response Code Accuracy

[msvechla]

Hi,

Currently, the request validation always returns 400 Bad Request as the HTTP response.
Would you be open to making the codes more configurable/accurate?

Especially in regards to the security authentication middleware, as 401 or 403 error codes would be a better fit for requests failing the validation by the AuthenticationFunc.

I would also be open to creating a PR if required.

Thanks a lot!

[msvechla]

Do you have an update or opinion about this?

[fenollp]

Yes feel free to open a PR. Finer / more configurable error codes / responses is always welcomed.