class LoginView(View):

def get(self, request, *args, **kwargs):
    # create a new form instance
    form = forms.LoginForm()

    return render(request, "login.html", {'form': form})

def post(self, request, *args, **kwargs):
    # create a form instance and populate it with data from the request
    form = forms.LoginForm(request.POST)
    # check whether is valid
    if form.is_valid():
        form.save()
        user_name = form.cleaned_data['username']
        password = form.cleaned_data['password']
        user = authenticate(username=user_name, password=password)
        if user is not None:
            login(request, user)
            return HttpResponseRedirect('/boletim/')
        else:
            return HttpResponseRedirect('/login/')
    else:
        return HttpResponseRedirect('/login/')