A generic Django authentication form template.

login_form.html

{% comment %}
Include this template from your site base template like so:

{% if user.is_anonymous %}
{% include "login_form.html" %}
{% endif %}

{% endcomment %}

{% load i18n %}

<form method="post" action="{% url django.contrib.auth.views.login %}">
  {{ auth_form.non_field_errors }}
  <p>
    {{ auth_form.username.errors }}
    <label for="id_username">{% trans "Username" %}:</label> <input type="text" name="username" id="id_username"> 
  </p>
  <p>
    {{ auth_form.password.errors }}
    <label for="id_password">{% trans "Password" %}:</label> <input type="text" name="password" id="id_password"> 
  </p>
  <p>
    <input type="hidden" name="csrfmiddlewaretoken" value="{{ csrf_token }}">
    <input type="submit" value="{% trans "Log in" %}">
    <input type="hidden" name="next" value="{{ next }}">
  </p>
</form>