{% if user.is_authenticated %} 
            <a href="{% url django.contrib.auth.views.logout %}">Logout</a> 
        {% else %} 
            <a href="{% url register %}">Sign Up</a> 
            </li> 
            <li> 
            <a href="{% url django.contrib.auth.views.login %}">Login</a> 
        {% endif %}