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=head2 B<get-max-uid>

Get maximum UID used.

=head2 B<get-user>

Get user details by username or uid.

Either C<user> OR C<uid> must be specified.

The function is not dissimilar to Unix's C<getpwnam()> or C<getpwuid()>.


=head2 B<get-user-groups>

Return groups which the user belongs to.

=head2 B<group-exists>

Check whether group exists.