django如何在一个浏览器中同时登录多个用户，避免session覆盖？

from django.contrib.auth import login 下面是django中的login源代码，请问怎么改才可以在一个浏览器中同时登录多个用户默认是最新登录的用户的session会覆盖之前用户的session。（就是在django_session表中覆盖，导致之前登录的用户的session被覆盖）如果是不同的浏览器则不会覆盖，总之同一个浏览器只能同时登录一个用户。网上有一种方法，是把session改为列表的形式，但是完全没头绪。没办法了，求解，多谢了。

def login(request, user, backend=None):

session_auth_hash = ''
if user is None:
    user = request.user
if hasattr(user, 'get_session_auth_hash'):
    session_auth_hash = user.get_session_auth_hash()

if SESSION_KEY in request.session:
    if _get_user_session_key(request) != user.pk or (
            session_auth_hash and
            not constant_time_compare(request.session.get(HASH_SESSION_KEY, ''), session_auth_hash)):

        request.session.flush()
else:
    request.session.cycle_key()

try:
    backend = backend or user.backend
except AttributeError:
    backends = _get_backends(return_tuples=True)
    if len(backends) == 1:
        _, backend = backends[0]
    else:
        raise ValueError(
            'You have multiple authentication backends configured and '
            'therefore must provide the `backend` argument or set the '
            '`backend` attribute on the user.'
        )
else:
    if not isinstance(backend, str):
        raise TypeError('backend must be a dotted import path string (got %r).' % backend)
request.session[SESSION_KEY] = user._meta.pk.value_to_string(user)
request.session[BACKEND_SESSION_KEY] = backend
request.session[HASH_SESSION_KEY] = session_auth_hash
if hasattr(request, 'user'):
    request.user = user
rotate_token(request)
user_logged_in.send(sender=user.__class__, request=request, user=user)