Welcome to the forums,
Your gonna laugh, but the the answer is actually in your previous post: user is 'public' password is 'public1234' and client workspace is 'public-view' assuming you have a /home/public/p4/ that's writable.
(Or /opt/zimbra-src or /site/src/zimbra/p4 or C:\p4 or /Users/public/p4 - every so often I clean up the extras and create some fresh linux, mac, and pc specific workspaces.)
We are in the process of setting up p4web so you can navigate using just a browser, additionally there are occasional tars up on
ZimbraCommunity - SourceForge.net