ASP.NET Identity 2.0 Email link expire

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C#

ASP.NET

MVC

Hello,

I am using the same code which is generate when create the new application. It is working fine. But i want to expire the email link which are getting after register. I add the code in Identiry.config file as below:

manager.UserTokenProvider =
                   new DataProtectorTokenProvider<ApplicationUser>(dataProtectionProvider.Create("ASP.NET Identity"))
                   {
                       TokenLifespan = TimeSpan.FromHours(72)
                   };

Now can any one help me how to check this expiration in controller method.

Thanks