AuthUserFile filename where:
filename is the name of file containing user definitions in the form: username:password
username is a user login name, and password is the DES-encrypted password.
Must not appear within a <Limit> or <LimitExcept> range.
Specifies that the named user file is to be used for any user names referenced in a require user or require valid-user directive.
Note that the use of groups-with-users=yes in the Init fn=htaccess-init directive in obj.conf, or specifying an AuthGroupFile directive with the same filename, causes that file to be assumed to be in the format: