@Override
public String sendUsernameChangedEmail(String email, String newUsername) {
InternetAddress to = Addresses.getAddress(email, newUsername);
boolean resetPassword = applicationConfiguration.isInternalAuth();
emailBuilder.sendMessage(new UsernameChangedEmailStrategy(
newUsername, resetPassword), null, to);
return msgs.get("jsf.email.usernamechange.SentNotification");
}