{{ form_start(form) }}
<div class="layout vertical">
    <div class="flex">
        <div class="layout horizontal">
            <div class="flex">
                {{ form_row(form.prenom) }}
            </div>
            <div class="flex">
                {{ form_row(form.nom) }}
            </div>
        </div>
    </div>
    <div class="flex">
        {{ form_row(form.email) }}
    </div>
    <div class="flex">
        {{ form_row(form.roles) }}
    </div>
    <div class="flex">
        {{ form_widget(form.submit) }}
    </div>
</div>
{{ form_end(form) }}