Just a quick reminder on how to reset a subversion users password on Slackware.
Use the find command to locate the ".svn-auth-file" file.
find / -name .svn-auth-file
In this case the result was:
/home/svn/.svn-auth-file
Run the htpasswd command to set a new password for the user joebloggs.
htpasswd -m /home/svn/.svn-auth-file joeblogs