@NonNull
    public static Credentials getGCVoteLogin() {
        final String username = StringUtils.trimToNull(getString(R.string.pref_username, null));
        final String password = getString(R.string.pref_pass_vote, null);
        return new Credentials(username, password);
    }
this method is to be solely used for auto-fixing GC username, see MainActivity.UpdateUserInfoHandler
main/src/main/java/cgeo/geocaching/settings/Settings.java