AuthenticationManager.GetExternalLoginInfoAsync() on google aspnet mvc5 returns null
问题 I've developed an ASPNET MVC 5 application using default Visual Studio 2015 Template and Google authentication. All works fine in the development environment but on real the call after external authentication AuthenticationManager.GetExternalLoginInfoAsync() sometimes returns null. Normally it returns null on the central hours of the day (from 08:00 to 20:00) but I haven't found a pattern because sometimes works at that time. I've watched the developer console, but there are not a lot of