Can't find __enter__ and __exit__ methods for sqlalchemy.orm.Session

Hi. I'm getting this error when trying to use sqlalchemy.orm.Session as a context manager.

**My code:**
`with sa.orm.Session(some_app) as session:`

**Errors:**
error: "Session" has no attribute "__enter__"; maybe "__iter__"?
error: "Session" has no attribute "__exit__"

_Package versions:_
SQLAlchemy=1.4.23
sqlalchemy-stubs=0.4

P.S.
This is the first time I'm writing an issue. If you need any clarification or suggestions, please, feel free to ask :)