AuthenticationManager.GetExternalLoginInfoAsync() on google aspnet mvc5 returns null

Question

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 th

Answer 1

I updated to version 4.0.1 of the Microsoft.Owin.Security.Google package and I was having the same problem. I was getting null and access_denied. Turns out the problem was due to a space that I had copied over in the Client Secret. It took me 2 days and lots of unnecessary code changes to figure this out. I noticed that when you click copy (not just copy) and paste from Google, there is a space at the end of the Client Secret.