ConsistentHash for Sticky Session - TTL

We are using ConsistentHash - Header name for Sticky Session.
We would like to know how long will it store the session and how can we clear the entry. We would like to time the entry to be available only for specific duration.

For example if an HTTPheadername=“user” field is used for load-balancing. if we fire requests with user=“user1”. then user1 detail should remain only for a day not more than that. How to configure this? But we are observing in a sample application that “user1” remains forever.

I could see TTL Cookie ConsistentHash But not for header name