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我正在尝试使用我的 gmail 收件箱查看收到的电子邮件的内容，imap但是当我运行代码时，出现以下错误。

错误

Error [ERR_STREAM_DESTROYED]: Cannot call write after a stream was destroyed
    at doWrite (_stream_writable.js:427:19)
    at clearBuffer (_stream_writable.js:551:7)
    at Socket.Writable.uncork (_stream_writable.js:325:7)
    at JSStreamSocket.doWrite (internal/js_stream_socket.js:162:17)
    at JSStream.onwrite (internal/js_stream_socket.js:20:57)
    at Socket.ondata (internal/js_stream_socket.js:64:22)
    at Socket.emit (events.js:210:5)
    at addChunk (_stream_readable.js:309:12)
    at readableAddChunk (_stream_readable.js:290:11)
    at Socket.Readable.push (_stream_readable.js:224:10) {
  code: 'ERR_STREAM_DESTROYED',
  source: 'socket'
}
events.js:187
      throw er; // Unhandled 'error' event
      ^

Error: self signed certificate
    at TLSSocket.onConnectSecure (_tls_wrap.js:1321:34)
    at TLSSocket.emit (events.js:210:5)
    at TLSSocket._finishInit (_tls_wrap.js:794:8)
    at TLSWrap.ssl.onhandshakedone (_tls_wrap.js:608:12)
    at Socket.ondata (internal/js_stream_socket.js:64:22)
    at …

我正在使用自定义 JWT 身份验证中间件来验证 JWT。

import jwt
from urllib.parse import parse_qs
from channels.db import database_sync_to_async
from django.contrib.auth import get_user_model
from django.contrib.auth.models import AnonymousUser
from django.conf import settings
from rest_framework_simplejwt.tokens import AccessToken


@database_sync_to_async
def get_user(user_id):
    User = get_user_model()
    try:
        user = User.objects.get(id=user_id)
        return user
    except User.DoesNotExist:
        return AnonymousUser()


class TokenAuthMiddleware:
    """
    Custom middleware (insecure) that takes user IDs from the query string.
    """

    def __init__(self, inner):
        # Store the ASGI application we were passed
        self.inner = inner

    async def __call__(self, scope, receive, …