fix: use ASGIConnection instead of Request for flash (#3626)

litestar/plugins/flash.py

@@ -7,7 +7,6 @@
 from typing import TYPE_CHECKING, Any, Mapping
 
 import litestar.exceptions
-from litestar import Request
 from litestar.exceptions import MissingDependencyException
 from litestar.middleware import DefineMiddleware
 from litestar.middleware.session import SessionMiddleware
@@ -20,7 +19,7 @@
     from collections.abc import Callable
 
     from litestar.config.app import AppConfig
-    from litestar.connection.base import AuthT, StateT, UserT
+    from litestar.connection.base import ASGIConnection
     from litestar.template import TemplateConfig
 
 
@@ -70,7 +69,7 @@ def on_app_init(self, app_config: AppConfig) -> AppConfig:
 
 
 def flash(
-    request: Request[UserT, AuthT, StateT],
+    request: ASGIConnection[Any, Any, Any, Any],
     message: Any,
     category: str,
 ) -> None: