There is org.xaloon.wicket.component.customer.panel.HeaderPanel, which uses this interface to show current username with logout link.
There is org.xaloon.wicket.component.security.impl.DefaultSecurityFacadeImpl which implements SecurityFacade and uses Spring security.
You may provide your custome security facade implementation if required.
I'll try to document more this case in 1.5 version ;)
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Regards,
Vytautas Racelis
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