How to reset current SVN - subclipse username

How
to reset current SVN - subclipse  username and password which
was stored already.

>From this FAQ

Subclipse
does not collect or store username and password credentials when
defining a repository. This is because the JavaHL and SVNKit client
adapters are intelligent enough to prompt you for this information
when they need to -- including when your password has changed.

You
can also allow the adapter to cache this information and a common
question is how do you delete this cached information so that you can
be prompted again? We have an open request to have an API added to
JavaHL so that we could provide a UI to do this. Currently, you have
to manually delete the cache. The location of the cache varies based
on the client adapter used.

JavaHL caches the information in
the same location as the command line client -- in the Subversion
runtime configuration area. On Windows this is located in
%APPDATA%\Subversion\auth. On Linux and OSX it is located in
~/.subversion/auth. Just find and delete the file with the cached
information.

SVNKit caches information in the Eclipse keyring.
By default this is a file named .keyring that is stored in the root
of the Eclipse configuration folder. Both of these values can be
overriden with command line options. To clear the cache, you have to
delete the file. Eclipse will create a new empty keyring when you
restart.

我用Ubuntu，所以比較熟 Linux的部份，就把自己家目錄的~/.subversion/auth砍掉，重開 eclipse 就好了。但是同事們用的是 M$ Windows，找半天找不到這目錄，後來才發現在

On Windows XP
C:\Documents and Settings\<name>\appdata\
Subversion\auth directory.

On Windows
Vista
C:\Users\<name​>\AppData\Roamin​g\Subversion\auth

依樣畫葫蘆，刪掉auth然後重開eclipse，系統就會提示要重新輸入使用者、密碼了。