account-linking-auth-server-code

  public IActionResult OnPost()
  {
      var request = HttpContext.Request;
      if (!ModelState.IsValid)
      {
          return Page();
      }

      //https://pitangui.amazon.com/spa/skill/account-linking-status.html?vendorId=M2AAAAAAAAAAAA#state=xyz&access_token=2YotnFZFEjr1zCsicMWpAA&token_type=Bearer

      var url = request.Query["redirect_uri"] + "#state=" + request.Query["state"] + "&access_token=2YotnFZFEjr1zCsicMWpAA&token_type=Bearer";
      return Redirect(url);
  }