我如何让Django相信我已经登录了？

from django.contrib.auth.decorators import login_required

@login_required
def my_view(request):
    # 处理已登录用户的逻辑
    ...

{% if user.is_authenticated %}
    <p>欢迎，{{ user.username }}！</p>
{% else %}
    <p>请先登录。</p>
{% endif %}

from django.contrib.auth.decorators import login_required
from django.shortcuts import render

@login_required
def my_view(request):
    if request.user.is_authenticated:
        # 用户已登录
        ...
    else:
        # 用户未登录
        ...