{% for message in app.flashes('error') %}
            <div class="alert alert-danger mt-3">
                {{ message }}
            </div>
        {% endfor %}

        {% if form.vars.errors is not empty %}
            <div class="alert alert-danger mt-3">
                {% for error in form.vars.errors %}
                    <li>{{ error.message }}</li>
                {% endfor %}
            </div>
        {% endif %}