Making subversion use system accounts

I'm setting up a subversion se开发者_如何学Pythonrver for hold my code for a website I've been working on, and I'm trying to do it all though svnserve, however I need to be able to access it using the system accounts, and I'd prefer not to have to copy/paste usernames and passwords into a plaintext file.

It's a debian server, and PAM is enabled. How can I get svn to authenticate off system user accounts?

How about using svn over ssh? This is a good blog entry: http://www.petefreitag.com/item/531.cfm