如何在graphene-django解析方法中访问认证用户？

import graphene

class Query(graphene.ObjectType):
    authenticated_user = graphene.Field(graphene.String)

    def resolve_authenticated_user(self, info):
        user = info.context.user
        if user.is_authenticated:
            return user.username
        else:
            return "Anonymous"

from django.views.decorators.csrf import csrf_exempt
from graphene_django.views import GraphQLView

urlpatterns = [
    # ...
    path('graphql', csrf_exempt(GraphQLView.as_view(graphiql=True, context={'request': request}))),
    # ...
]