Custom Drupal main menu which detects Log in link an adds class to it

menu--main.html.twig

{% macro menu_links(items, attributes, menu_level) %}
  {% import _self as menus %}
  {% if items %}
    {% if menu_level == 0 %}
      <ul{{ attributes.addClass('menu') }}>
    {% else %}
      <ul class="menu">
    {% endif %}
    {% for item in items %}
      {%
        set classes = [
          'menu-item',
          item.is_expanded ? 'menu-item--expanded',
          item.is_collapsed ? 'menu-item--collapsed',
          item.in_active_trail ? 'menu-item--active-trail',
          loop.last ? 'menu-item--last',
          item.title.getUntranslatedString() == 'Log in' ? 'item-login'
        ]
      %}
      <li{{ item.attributes.addClass(classes) }}>
        <a href="{{ item.url }}" title="{{ item.title }}" data-drupal-link-system-path="{{ item.url.getInternalPath() }}">
          <span>{{ item.title }}</span>
        </a>
        {% if item.below %}
          {{ menus.menu_links(item.below, attributes, menu_level + 1) }}
        {% endif %}
      </li>
    {% endfor %}
    </ul>
  {% endif %}
{% endmacro %}