Use a TypeVar for flatten_user to workaround Pyright bug

discord/member.py

@@ -28,7 +28,7 @@ import datetime
 import inspect
 import itertools
 from operator import attrgetter
-from typing import Any, Awaitable, Callable, Collection, Dict, List, Optional, TYPE_CHECKING, Tuple, Union, Type
+from typing import Any, Awaitable, Callable, Collection, Dict, List, Optional, TYPE_CHECKING, Tuple, TypeVar, Union
 
 import discord.abc
 
@@ -48,6 +48,8 @@ __all__ = (
     'Member',
 )
 
+T = TypeVar('T', bound=type)
+
 if TYPE_CHECKING:
     from typing_extensions import Self
 
@@ -205,7 +207,7 @@ class _ClientStatus:
         return self
 
 
-def flatten_user(cls: Any) -> Type[Member]:
+def flatten_user(cls: T) -> T:
     for attr, value in itertools.chain(BaseUser.__dict__.items(), User.__dict__.items()):
         # ignore private/special methods
         if attr.startswith('_'):