{% set label = element.label|applyContextTrans|trans(app.request.get('username') is not null ? {'%username%' : app.request.get('username')} : {}) %}
<a class="{{ element.class|default('') }}" href="{{ path(element.route|applyContext, element.params) }}" aria-label="{{ 'aria.breadcrumb'|trans({'%label%': label}) }}">
    {{ label }}
</a>