[Zope] How to know which user is seeing a page?

[Jose G. Dinuncio F.]

Hi, everybody.

    I've developed an external method in the private part of my zope
site to do a job, but I need a log of who called it.
    My Q: is any way that I could know the name(login) of the user that
is accessing to a zope object?

Thanks in advance
JD