这是在adbapi查找后在延迟的回调中断开高速公路客户端断开连接的正确方法吗？

Question

每个客户端在初始握手期间都设置了X-Auth-Token标头。服务器需要进行数据库查找以验证auth-token是否有效。如果无效，则服务器需要拒绝连接并以403状态响应握手。

我做对了吗？

class EchoServerProtocol(WebSocketServerProtocol):
  def onConnect(self, request):
    authToken = request.headers['x-auth-token']
    user = User(authToken, self.factory.protocols)
    user.processNewConnection()
    return (None, headers)

class User():
    def __init__(self, authToken, factoryProtocols):
        self.authToken = authToken
        self.factoryProtocols = factoryProtocols

    def processNewConnection(self):
        query = "SELECT name, address, role, access_token FROM dummy_user WHERE access_token = '"+ self.authToken +"'"
        return dbpool.runQuery(query).addCallback(self.handleResult).addErrback(self.errorquery)

    def errorquery(self,result):
        print ("error received", result)
        ## Please suggest a better way here
        return result

    def handleResult(self, result):
        if result:
            ## blah blah blah...

        else:
            ## Please suggest a better way here
            raise ConnectionDeny(ConnectionDeny.FORBIDDEN, u'Invalidoooo authentication token'.format(u', '.join(self.factoryProtocols)))


        return