ngrx中如何在dispatch中获取接口返回的状态？

Question

this._store.dispatch(new AddUserAction(this.user));
我要在这里获取到code做进一步操作

Effects:
@Effect() addUser$ = this._actions$.pipe(

    ofType<UserAction.AddUserAction>(UserAction.UserActionTypes.ADD_USER),
    switchMap(data => {
        return this._userService.addUser(data.payLoad).pipe(
            map(res => {
                if (res.code === 200) {
                    return new UserAction.AddUserSuccessAction(res);
                } else {
                    return new UserAction.AddUserFailAction(res.code);
                }
            }),
            catchError(error => of(new UserAction.AddUserFailAction(error)))
        );
    })
);