public async Task <IActionResult> OnGet(int?clickTimeFrame) { if (clickTimeFrame.HasValue && clickTimeFrame < -90) { clickTimeFrame = -90; } ClickTimeFrame = clickTimeFrame ?? -30; var user = await _userManager.GetUserAsync(User); if (user == null) { return(NotFound($"Error: Unable to load user with ID '{_userManager.GetUserId(User)}'.")); } ShortenedUrls = await _urlShortenerService.GetShortenedUrlsByUserId(user.Id); return(Page()); }