{% comment %}
Deliberately identical for an unknown, expired and already-accepted token: the
page must not report which invitations exist.
{% endcomment %}
<h2>This invitation is no longer valid</h2>
<p>It may have expired, been revoked, or already been used. Ask whoever invited you to send a new one.</p>
<p><a href="{% url 'account_login' %}">Sign in</a></p>