{% extends 'bootstrap_4_layout.html.twig' %}
{% block email_widget %}
    <div class="input-group mb-2">
        <div class="input-group-prepend">
            <div class="input-group-text">@</div>
        </div>
        <input type="text" class="form-control" id="inlineFormInputGroup" placeholder="Username">
    </div>
    {{ block('email_widget') }}
{% endblock %}