I have a WebForms app using external login (Microsoft and Google) and ASP.Net Identity 2.
I want the external login to persist when user comes back to the web site. Currently when user comes back they have to login again using the external provider.
I understand one way to do this is create persistent Application Cookie after locating the user like answered in this SO question.
But this is not acceptable since the requirement is that the user should be signed out if they sign out from the external provider.
If I create persistent "Application Cookie", Is there a way I can validate if user is still logged in externally.
OR
Are there any other ways of achieving this?
