[keycloak-user] Want Session expired or not from keycloak server

Hi all, I am using Keycloak 3.4.3.Final as SSO solution for my applications. I want to display session inactivity popup if user is inactive for certain time, I want to know in how much time session is going to be expired, so that he can click on continue button to keep session continue, or he can logout immediately by clicking logout button in popup. I there any way to know session expiry time? I tried with ActiveToken's API isExpired() but it doesn't serve my purpose.Is there any way to know session is expired or active?Please help me. Thanks,Mukesh Harshwal