如何在重定向控制器中使用Open ID Connect检索传递给AAD的参数？

我正在使用带有Azure Active Directory的Open Id Connect进行身份验证。我还为OpenIdConnectChallengeProperties设置了一个参数，以便可以在控制器操作（即重定向URL）中检索此参数。我没有找到有关如何执行此操作的任何信息。我的代码如下。

AuthController.cs

 [Route("auth/signin")]
        [HttpPost]
        public ActionResult SignIn([FromBody] RequestParams requestParams)
        {
            Guid guid = new Guid();
            _cache.Set(guid, requestParams);
            var baseURL = Request.Host;
            var redirectURL = "https://" +  baseURL + "/auth/redirect";
            var properties = new OpenIdConnectChallengeProperties();
            properties.SetParameter("id",guid);
            properties.RedirectUri = redirectURL;
            return Challenge(properties, AzureADDefaults.OpenIdScheme);
        }

[Route("auth/redirect")]
        [HttpGet]
        public async Task<string> HandleAADRedirect()
        {
            if (User.Identity.IsAuthenticated)
            {
                string accessToken = await HttpContext.GetTokenAsync("access_token");
                string idToken = await HttpContext.GetTokenAsync("id_token");
            }
            return _cache.Get("").ToString();
        }