public async Task <IActionResult> OnPostAsync(IFormFile file)
        {
            var      fileName   = Path.GetFileName(file.FileName);
            DateTime now        = DateTime.Now;
            var      base64Time = Base64Encoder.GetBase64String($"{now.ToShortDateString()} {now.ToShortTimeString()}");
            var      base64File = Base64Encoder.GetBase64String(fileName);
            var      user       = User.Identities.FirstOrDefault();

            await _storageService.AddImageAsync(file.OpenReadStream(), fileName, user.Name);

            return(RedirectToPage("UploadSuccess", new { file = base64File, time = base64Time }));
        }