def login(request, template_name):
    """
        Connection de l'utilisateur
    """
    current_url = request.POST.get['current_url', '']
    if request.user.is_authenticated():
        return HttpResponseRedirect("/acces-membres/")
    else:
        if request.method == 'POST':
            form = LoginForm(request.POST)
            if form.is_valid():
                username = request.POST['username']
                password = request.POST['password']
                user = authenticate(username=username, password=password)
                if user:
                    auth_login(request, user)
                    request.session['connected_user'] = username
                    messages.success(request, 'Vous êtes désormais connecté. Bienvenue!')
                    return HttpResponseRedirect("/acces-membres/")
                else:
                    messages.error(request, 'Erreur lors de la connection. Si l\'erreur persiste veuillez nous contacter.')
    return HttpResponseRedirect(current_url)


<form action="{% url "client_login" %}" method="POST">
    {% csrf_token %}
        {{ field.errors }}<br />
        {{ forms.as_ul }}
    <input type="hidden" name="current_url" value="{{ request.get_full_path }}" />
    <input type="submit" value="{% trans "Connection" %}" />
    <input type="hidden" name="next" value="{{ next }}" />
</form>


#'instancemethod' object is unsubscriptable