درباره is_authenticated

سلام خسته نباشید در قسمت 10 که از کد :  is_authenticated برای من  django ارور میده 

ارور : 

 کد من : 

from django.shortcuts import render
from django.http import HttpResponse
from .forms import ContactForm, LoginForm


def home_page(request):
    context = {
        "title": "Eskandarijoon",
        "myName": "daniel"
    }
    return render(request, "home_page.html", context)


def about_page(request):
    return HttpResponse('about us ')


def contact_page(request):
    form = ContactForm(request.POST or None)
    context = {
        "title": "contact",
        "form": form
    }
    if form.is_valid():
        print(form.cleaned_data)
    if request.method == "POST":
        print(request.POST.get('fullname'))
    return render(request, 'contact/view.html', context)


def login_page(request):
    print(f"is user logged in {request.user.is_authenticated}")
    form = LoginForm(request.POST or None)
    context = {
        "form": form,
    }
    if form.is_valid():
        print(form.cleaned_data)
    return render(request, "auth/login.html", context)