fixing issue with _app when using dispatch, need to keep in context

Author: BSd3v

dash/server_factories/fastapi_factory.py

@@ -215,7 +215,9 @@ async def serve(request: Request, package_name: str, fingerprinted_path: str):
             serve,
         )
 
-    def dispatch(self, _app, dash_app, _use_async):
+    def dispatch(
+        self, app, dash_app, use_async=False
+    ):  # pylint: disable=unused-argument
         async def _dispatch(request: Request):
             adapter = FastAPIRequestAdapter()
             set_request_adapter(adapter)

dash/server_factories/flask_factory.py

@@ -127,7 +127,9 @@ def serve(package_name, fingerprinted_path):
             serve,
         )
 
-    def dispatch(self, _app, dash_app, use_async=False):
+    def dispatch(
+        self, app, dash_app, use_async=False
+    ):  # pylint: disable=unused-argument
         def _dispatch():
             adapter = FlaskRequestAdapter()
             set_request_adapter(adapter)