how to display principalName and uid with wsadmin

Question

trying to display principalName and uid fields with wsadmin.sh. Filtering with the wild card:

wsadmin>print AdminTask.searchUsers('[-principalName *]')
CN=John Dow,OU=company1,OU=Accounts,DC=foo,DC=company1,DC=com
CN=Jane Dow,OU=company2,OU=Accounts,DC=foo,DC=company2,DC=com
<and so on>

How do I get the uid displayed along with the CN? Something like:

uid=johnD,CN=John Dow,OU=company1,OU=Accounts,DC=foo,DC=company1,DC=com
uid=janeD,CN=Jane Dow,OU=company2,OU=Accounts,DC=foo,DC=company2,DC=com

Or something along these lines?

The help clause isn't helpful either:

wsadmin>print AdminTask.help('searchUsers')
WASX8006I: Detailed help for command: searchUsers

Description: Searches PersonAccounts.

Target object:   None

Arguments:
  securityDomainName - Name used to uniquely identify the security domain.
  cn - The common name of the entity.
  sn - The surname of the entity.
  principalName - The principal name of a PersonAccount.
  mail - The e-mail address of the PersonAccount.
  uid - The UID of the PersonAccount.
  timeLimit - A maximum amount of time, in milliseconds, to run a search.
  countLimit - The maximum number of entities to return.
  clearCache - The mode of clearing cache before the operation. Valid value is 'clearAll'.

definitely a noob here. Any useful doc refs would help as well - couldn't find any examples with what I'm after and/or how to change the output formatting in general.

I tried different filters, but I don't know how to force the uid get displayed.

Thanks