Intermittent ASP.NET oAuth issue with Google, AuthenticationManager.GetExternalIdentityAsync is returning null

Question

I am trying to fix an intermittent issue when using Google as an external login provider.

When attempting to login, the user is redirected back to the login page ra

Answer 1

I forgot to enable "Google + API" in the google developer console. Google login appears to be fine, but GetExternalLoginInfoAsync returns null.

You can follow this link https://stackoverflow.com/a/27631109/657926