When you perform a Subversion operation that requires you to authenticate, by default Subversion caches your authentication credentials on disk. This is done for convenience so that you don’t have to continually reenter your password for future operations. If you’re concerned about caching your Subversion passwords, you can disable caching either permanently or on a case-by-case basis.
To disable password caching for a particular one-time command,
--no-auth-cache option on the command
line. To permanently disable caching, you can add the line
store-passwords = no to your local machine’s
Subversion configuration file. See Client Credentials Caching for details.
 Of course, you’re not terribly worried—first because you know that you can’t really delete anything from Subversion, and second because your Subversion password isn’t the same as any of the other 3 million passwords you have, right? Right?