Add ability to specify user in OpenAI and ChatOpenAI

[mirkancal]

Feature request

https://platform.openai.com/docs/guides/safety-best-practices

It seems missing.

Motivation

We can pass userId to OpenAI, not sure if there's any benefits except for them to monitor users.

Your contribution

Checking how to add without breaking the code.

[davidmigloz]

thanks for reporting @mirkancal!
Let me take a quick look. It should be easy to add.

[davidmigloz]

Done!

Now you can either specify it when instantiating the wrapper if the user will be always the same:

final chat = ChatOpenAI(
  apiKey: '...', 
  user: 'user123456',
);

Or when calling the llm if the user varies per request:

final res = await chat(
  [query],
  options: const ChatOpenAIOptions(user: 'user123456'),
);

Btw, thank you very much for assisting people in our discord, I really appreciate it 🙂