How to rewrite this @effect for api delete call returning no entity?

Question

The problem is that api.deleteUser returns null (status 204), so the user is lost. How to pass the user (which is action.payload) to DeleteUserSuccess(user)?

@Effect()
public deleteUser$: Observable<Action> = this._actions$
    .ofType(DELETE_USER_PENDING)
    .pipe(
    switchMap((action: IAction<User>) => 
    this.api.deleteUser((action.payload as User).id)),
    map((user: User) => new DeleteUserSuccess(user)),
    catchError((err: Error, caught: Observable<Action>) => {
        console.log(err);
        return caught;
    })
    );

Answer 1

I've found the solution

@Effect()
    public deleteUser$: Observable<Action> = this._actions$
        .ofType(DELETE_USER_PENDING)
        .pipe(
        switchMap((action: IAction<User>) =>
        this.api.deleteUser((action.payload as User).id).
        map(() => new DeleteUserSuccess(action.payload as User))),
       // map((user: User) => new DeleteUserSuccess(user)),
        catchError((err: Error, caught: Observable<Action>) => {
            // tslint:disable-next-line
            console.log(err);
            return caught;
        })
        );