title: How to add an initial/default value using Django Filters?
body: <p>How can I add an initial/default value when using <a href="https://github.com/carltongibson/django-filter" rel="noreferrer">Django Filters</a>?</p>
  
  <p>For example, something like this <code>initial=False</code></p>
  
  <pre><code>class UserFilter(django_filters.FilterSet):
      archive = django_filters.BooleanFilter(initial=False)
  
      class Meta:
           model = User
           fields = ['archive']
  </code></pre>
  
  <p>I've tired to override the <code>__init__</code> but this does not appear to work.</p>