Possible incorrect type annotation for `**kwargs` in the `Authenticate` constructor.

[FakeDocument]

Streamlit Version

1.41.1

Streamlit Authenticator Version

0.4.2

Environment

Ubuntu, python 3.10.12

What happened?

Summary

Possible incorrect type annotation for **kwargs in the Authenticate constructor.

Details

In /views/authentication_view.py, the constructor of the Authenticate class includes the following parameter:

**kwargs: Optional[Dict[str, Any]]

However, this annotation seems problematic. **kwargs cannot be typed as a dictionary directly — doing so implies that a single dictionary is expected as the unpacked keyword arguments, which isn't valid Python typing. It would mean that this is acceptable:

Authenticate(credentials, some_key={"foo": bar})

But from context, that doesn't seem to be the intended usage.

The more appropriate and syntactically valid form would likely be:

**kwargs: Any

Suggestion

If this interpretation is correct, I’d be happy to open a PR to fix it.

Let me know what you think!

What did you expect to happen?

No response

Steps to reproduce

None.