demoAuthorizationCodeReceivedSessionNull

this is a demo ASP.NET project, created by Visual Studio Enabled Authentication try to store token in session, but session is null in Startupauth.cs

     AuthorizationCodeReceived = (context) =>
            {
                        var code = context.Code;
                        var ctx = context.OwinContext.Environment["System.Web.HttpContextBase"] as HttpContextBase;

running out of ideas