Fix a regression in AppSyncResolver

Author: leandrodamascena

tests/events/appSyncBatchEvent.json

@@ -1,7 +1,7 @@
 [
   {
     "arguments": {
-      "id": "1"
+      "user_id": "1"
     },
     "identity": {
       "sub": "192879fc-a240-4bf1-ab5a-d6a00f3063f9",
@@ -23,7 +23,7 @@
   },
   {
     "arguments": {
-      "id": "2"
+      "user_id": "2"
     },
     "identity": {
       "sub": "192879fc-a240-4bf1-ab5a-d6a00f3063f9",

tests/functional/event_handler/required_dependencies/appsync/test_appsync_single_resolvers.py

@@ -261,7 +261,7 @@ def test_include_router_access_current_event():
     router = Router()
 
     @router.resolver(field_name="createSomething")
-    def get_user(id_user: str) -> dict:
+    def get_user(id: str) -> dict:  # noqa AA03 VNE003
         return router.current_event.identity.sub
 
     app.include_router(router)
@@ -281,7 +281,7 @@ def test_app_access_current_event():
     app = AppSyncResolver()
 
     @app.resolver(field_name="createSomething")
-    def get_user(id_user: str) -> dict:
+    def get_user(id: str) -> dict:  # noqa AA03 VNE003
         return app.current_event.identity.sub
 
     # WHEN we resolve the event