user's user's id :)

plugins/administrator/INSTALL

@@ -8,7 +8,7 @@ permissions to 660. This file must be owned by the user who you
 want to have access to this plugin (only one user allowed) and
 the group must be the group of the user who is running php. This 
 authentication method requires posix support in php and doesn't 
-work, if user's uid equals to 0.
+work, if user's id equals to 0.
 
 An alternative method, but less secure, is to add a file called
 admins into the plugin folder with the names of the users that