public boolean authenticate(String string, char[] c, String string0) throws Exception {
                StringUtils stringutils = new StringUtils();
                char password[] = new char[100];
                try {
                    DbBean db = new DbBean();
                    db.connect();
                    String mySQL = "SELECT * FROM backend_user WHERE username = '"+string+"'";
                    ResultSet rs = db.execSQL(mySQL);
                    while (rs.next()) {
                        password = (stringutils.decodeBase64(rs.getString("password"))).toCharArray();
                        user_id = rs.getString("id");