<form action="{% url 'authentication:user_login' %}" style="display: block;" method="POST">
                                {% csrf_token %}
                                <label for="username">Username:</label>
                                <input id="username" type="text" name="username" placeholder="Enter Username" tabindex="1" class="form-control">

                                <label for="password">Password:</label>
                                <input id="password" type="password" name="password" tabindex="=2" class="form-control" placeholder="Password">

                                <button type="submit" class="btn btn-success">Login</button> or <a href="{% url 'authentication:register' %}">register</a> here
                            </form>

def user_login(request):
    if request.method == "POST":
        username = request.POST.get('username')
        password = request.POST.get('password')

        user = authenticate(username=username, password=password)

        if user:
            if user.is_active:
                login(request, user)
                return HttpResponseRedirect(reverse('homepage'))  # main page if login is successful

            else:
                return HttpResponse("ACCOUNT NOT ACTIVE")

        else:
            print('Someone tried to log in and failed')
            print('Username: {}, password, {}'.format(username, password))
            return HttpResponse('Invalid login details supplied')

    else:
        return render(request, 'authentication/login.html', {})