{% for label, messages in app.flashes %}
    {% for message in messages %}
        <div class="alert alert-{{ label }} alert-dismissible">
            <button type="button" class="btn-close" data-bs-dismiss="alert"
                    aria-label="Close"></button>
            <div class="alert-message">
                {{ message|raw}}
            </div>
        </div>
    {% endfor %}
{% endfor %}