LoginListener.java

package app.config;

import org.springframework.context.ApplicationListener;
import org.springframework.security.authentication.event.InteractiveAuthenticationSuccessEvent;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.stereotype.Component;

@Component
public class LoginListener implements ApplicationListener<InteractiveAuthenticationSuccessEvent> {
    
    @Override
    public void onApplicationEvent(InteractiveAuthenticationSuccessEvent event)
    {
        UserDetails user = (UserDetails) event.getAuthentication().getPrincipal();
        System.out.println("LOGIN name: "+user.getUsername());
    }
}