Working on an Auction Site - had questions

[card51shor]

oh it does I didn't include it all. Here is the whole thing :

from django.contrib.auth import authenticate, login, logout
from django.db import IntegrityError
from django.http import HttpResponse, HttpResponseRedirect
from django.shortcuts import render
from django.urls import reverse

from .models import User


def index(request):
    return render(request, "auctions/index.html")


def login_view(request):
    if request.method == "POST":

        # Attempt to sign user in
        username = request.POST["username"]
        password = request.POST["password"]
        user = authenticate(request, username=username, password=password)

        # Check if authentication successful
        if user is not None:
            login(request, user)
            return HttpResponseRedirect(reverse("index"))
        else:
            return render(request, "auctions/login.html", {
                "message": "Invalid username and/or password."
            })
    else:
        return render(request, "auctions/login.html")


def logout_view(request):
    logout(request)
    return HttpResponseRedirect(reverse("index"))


def register(request):
    if request.method == "POST":
        username = request.POST["username"]
        email = request.POST["email"]

        # Ensure password matches confirmation
        password = request.POST["password"]
        confirmation = request.POST["confirmation"]
        if password != confirmation:
            return render(request, "auctions/register.html", {
                "message": "Passwords must match."
            })

        # Attempt to create new user
        try:
            user = User.objects.create_user(username, email, password)
            user.save()
        except IntegrityError:
            return render(request, "auctions/register.html", {
                "message": "Username already taken."
            })
        login(request, user)
        return HttpResponseRedirect(reverse("index"))
    else:
        return render(request, "auctions/register.html")

def auction(request):
    if request.method == "POST":
        title = request.POST.get("title")
        description = request.POST.get("description")
        price = request.POST.get("price")
        category = request.POST.get("category")
        new = NewPost.objects.create(title, description, price, category)
        new.save()
        return render(request, "auctions/auction.html")
    else:
        return render(request, "auctions/auction.html")


def watchlist(request):
    return render(request, "auctions/watchlist.html")

def categories(request):
    return render(request, "auctions/categories.html")