[Python] OAuth2 support & refresh-tokens

Description

Hi! I have a few questions:

1. Is it planned to integrate some sort of support for OAuth2 in that way that it would be auto-generated? If not, would you approve a PR to integrate it?
2. It would be nice to use refresh-tokens to get transparent authorization. So if user makes a request and his token is outdated it would be great to try to renew token with refresh-token to avoid additional error throwing. Can this be integrated into the auto-generated client? Would such feature be merged if a PR is proposed?