Since Subversion caches auth credentials by default (both username
and password), it conveniently remembers who you were acting as the last
time you modified your working copy. But sometimes that’s not
helpful—particularly if you’re working in a shared working copy such as
a system configuration directory or a web server document root. In this
case, just pass the --username
option on the command line, and Subversion will attempt to
authenticate as that user, prompting you for a password if
necessary.