Fix: Auth failure listener

- Authentication principal is not String

security/src/main/java/org/genesys/blocks/security/lockout/AuthenticationFailureBadCredentialsListener.java

@@ -15,11 +15,13 @@
  */
 package org.genesys.blocks.security.lockout;
 
+import org.genesys.blocks.security.model.BasicUser;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.ApplicationListener;
 import org.springframework.security.authentication.event.AuthenticationFailureBadCredentialsEvent;
+import org.springframework.security.core.userdetails.UserDetails;
 import org.springframework.security.web.authentication.WebAuthenticationDetails;
 import org.springframework.stereotype.Component;
 
@@ -45,7 +47,14 @@ public class AuthenticationFailureBadCredentialsListener implements ApplicationL
 	 */
 	@Override
 	public void onApplicationEvent(final AuthenticationFailureBadCredentialsEvent event) {
-		final String userName = (String) event.getAuthentication().getPrincipal();
+		final Object principal = event.getAuthentication().getPrincipal();
+
+		String userName = null;
+		if (principal instanceof BasicUser<?>) {
+			userName = ((BasicUser<?>) principal).getUsername();
+		} else if (principal instanceof UserDetails) {
+			userName = ((UserDetails) principal).getUsername();
+		}
 
 		final Object details = event.getAuthentication().getDetails();
 		if ((details != null) && (details instanceof WebAuthenticationDetails)) {