rootReducer return 추가

src/redux/reducers/rootReducer.ts

@@ -88,7 +88,7 @@ const appReducer = combineReducers({
 
 const rootReducer = (state, action) => {
   if (action.type === 'auth/USERS_LOGOUT_SUCCESS') {
-    appReducer(undefined, action);
+    return appReducer(undefined, action);
   }
   return appReducer(state, action);
 };