function ajax_register(){

        // First check the nonce, if it fails the function will break

        check_ajax_referer( 'ajax-register-nonce', 'security' );
        // Nonce is checked, get the POST data and sign user on
        $welcome = __("Welcome! Check your email. Processing...", "KleeiaDev");
        $user_login = $_POST['user_login'];
        $sanitized_user_login = sanitize_user( $user_login );
        $user_email = $_POST['user_email'];
        $user_pass = wp_generate_password( 12, false);
        $user_tp = $_POST['user_tp'];
        if(empty($user_tp)) $capa = 'subscriber';
        else $capa = $user_tp;

        //This is my custom function to check if my email is correctly filled in

        $extraerrors = registration_errors();
        $user_id = wp_create_user( $sanitized_user_login, $user_pass, $user_email, $capa );

        $info = array();
        $info['user_login'] = $user_login;
        $info['user_password'] = $user_pass;
        $info['remember'] = true;

        //here I check If creating user gives back errors

        if (is_wp_error($user_id) or is_wp_error($extraerrors)){
            $error  = $user_id->get_error_codes();

        //this is working and gives back default messages

            if(in_array('empty_user_login', $error))
               echo json_encode(array('loggedin'=>false, 'message'=>__($user_id->get_error_message('empty_user_login'))));
            elseif(in_array('existing_user_login',$error))
                echo json_encode(array('loggedin'=>false, 'message'=>__('This username is already registered.')));
            elseif(in_array('existing_user_email',$error))
                echo json_encode(array('loggedin'=>false, 'message'=>__('This email address is already registered.')));

       //this is not working and I can't display my $extraerrors

            elseif(in_array('empty_email',$extraerrors))
                echo json_encode(array('loggedin'=>false, 'message'=>__($extraerrors->get_error_message('empty_email'))));
            elseif(in_array('invalid_email',$extraerrors))
                echo json_encode(array('loggedin'=>false, 'message'=>__($extraerrors->get_error_message('invalid_email'))));
            elseif(in_array('email_exists',$extraerrors))
                echo json_encode(array('loggedin'=>false, 'message'=>__($extraerrors->get_error_message('email_exists'))));
            } else {
            $user_signon = wp_signon( $info, false );
            $user = new WP_User($user_id);
            $user->set_role($capa);
            update_user_meta( $user_id, 'user_tp', $user_tp );
            update_user_option( $user_id, 'default_password_nag', true, true );
            KleeiaDev_new_user_notification($user_id, $user_pass );
            KleeiaDev_new_user_notification_admin($user_id);
            echo json_encode(array('loggedin'=>true, 'message'=> $welcome));
        }
        die();
    }

        //this is my external function to check my email

        function registration_errors(){
            $errors = new WP_Error();
            if ( $user_email == '' ) {
                $errors->add( 'empty_email', __( '<strong>Error</strong>: Please type your e-mail address.', $current_theme_locale_name ) );
            } elseif ( ! is_email( $user_email ) ) {
                $erros->add( 'invalid_email', __( '<strong>Error</strong>: The email address isn&#8217;t correct.', $current_theme_locale_name ) );
            } elseif ( email_exists( $user_email ) ) {
                $errors->add( 'email_exists', __( '<strong>Error</strong>: This email is already registered, please choose another one.', $current_theme_locale_name ) );
            }
            if ( empty( $errors->get_error_codes() ) ) {
                return $errors;
            }
            return true;
        }