protected Authentication buildFinalAuthentication(final AuthenticationResult authenticationResult) {
        return authenticationResult.getAuthentication();
    }
Action that handles the {@link TicketGrantingTicket} creation and destruction. If the
action is given a {@link TicketGrantingTicket} and one also already exists, the old
one is destroyed and replaced with the new one conditionally.

@author Scott Battaglia
@since 3.0.0
support/cas-server-support-actions-core/src/main/java/org/apereo/cas/web/flow/login/CreateTicketGrantingTicketAction.java