String username = request.getParameter("username");
                String email = request.getParameter("email");
                String password = request.getParameter("password");
                String passwordConf = request.getParameter("password-conf");

                if (password.equals(passwordConf)) {
                    if (!database.checkNames(username)) {
                        out.print(usernameAlreadyBeentaken);
                    } else {
                        database.insertData(username, email, password);
                        out.print(username + successfulRegistration);
                    }
                } else {
                    out.print(invalidPassword);
                }