Reproduce the svn client password verification box

Problem:
After you connect to SVN with tortoisesvn and save the user name/password, you cannot change the user name for logon.

Solution:
The original password is cached in the client file system:
C: \ Documents ents and Settings \ Administrator \ Application Data \ subversion \ auth
Delete all the folders under auth and connect to the remote server again. The dialog box is displayed!

Question:
Once multiple projects exist
C: \ Documents ents and Settings \ Administrator \ Application Data \ subversion \ auth contains multiple files, and the file names and content of these files are not described in the project, what can I do if I cannot map a project to a file?