+package SL::Auth::Constants;
+
+use strict;
+
+use Exporter qw(import);
+
+our %EXPORT_TAGS = (
+ OK => [ qw(
+ OK
+ ) ],
+ ERR => [ qw(
+ ERR_PASSWORD
+ ERR_BACKEND
+ ) ],
+ SESSION => [ qw(
+ SESSION_OK
+ SESSION_NONE
+ SESSION_EXPIRED
+ ) ],
+);
+
+# add all the other ":class" tags to the ":all" class,
+# deleting duplicates
+{
+ my %seen;
+ push @{$EXPORT_TAGS{all}}, grep {!$seen{$_}++} @$_ for values %EXPORT_TAGS;
+}
+
+Exporter::export_ok_tags('all');
+
+use constant OK => 0;
+use constant ERR_PASSWORD => 1;
+use constant ERR_BACKEND => 100;
+
+use constant SESSION_OK => 0;
+use constant SESSION_NONE => 1;
+use constant SESSION_EXPIRED => 2;
+
+1;
+
+__END__
+
+=head1 NAME
+
+SL::Auth::Constants - COnstants for Auth module
+
+=head1 SYNOPSIS
+
+ use SL::Auth::Constants qw(:all);
+
+ OK == $auth->authenticate($user, $pass) or die;
+
+=head1 DESCRIPTION
+
+This module provides status constants for authentication handling
+
+=head1 FUNCTIONS
+
+=head1 BUGS
+
+=head1 AUTHOR
+
+=cut