@JsonIgnore
    @Override
    public ZonedDateTime getIdleExpirationTime(final Ticket ticketState) {
        val lastTimeUsed = ticketState.getLastTimeUsed();
        return lastTimeUsed.plusSeconds(this.timeToKillInSeconds);
    }
The time to kill in seconds.
core/cas-server-core-tickets-api/src/main/java/org/apereo/cas/ticket/expiration/TimeoutExpirationPolicy.java