[Feature Request] Add a toggle to use proxy or not in the `ask` API.

[ParadoxZW]

It seems that only the procedure of 'login in and get access token' needs proxy in China, while the ask API doesn't.

Since using proxy servers may cause unstability, I'd prefer use proxy when updating access tokens, not use when calling ask.

[rawandahmad698]

answer, previous_convo, convo_id = ChatHandler.ask(auth_token=access_token,
                                                           prompt=prompt,
                                                           conversation_id=self.conversation_id,
                                                           previous_convo_id=self.previous_convo_id,
                                                           proxies=self.options.proxies)

options.proxies are used, so make sure to add an option, and add proxies, it's used for all requests

[ParadoxZW]

So if I initial a ChatHandler with proxy set in the options, but call ask without passing the argument of proxies, will it use proxy or not, when making the post requests to talk with ChatGPT? I hope not.