如何将用户信息添加到nlog错误日志记录

<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  
  <targets>
    <target xsi:type="File" name="errorLog" fileName="logs/error.log" />
  </targets>
  
  <rules>
    <logger name="*" minlevel="Error" writeTo="errorLog" />
  </rules>
  
  <layout xsi:type="JsonLayout">
    <attribute name="time" layout="${longdate}" />
    <attribute name="level" layout="${level:upperCase=true}" />
    <attribute name="message" layout="${message}" />
    <attribute name="user" layout="${aspnet-request:serverVariable=LOGON_USER}" />
  </layout>
  
</nlog>

private static readonly Logger logger = LogManager.GetCurrentClassLogger();

public void SomeMethod()
{
    try
    {
        // 代码逻辑
    }
    catch (Exception ex)
    {
        logger.Error(ex, "An error occurred.");
    }
}