REsponse Message for a Valid User Request

<message_body>
<users>
<user>
<full_name>Mike M</full_name>
<user_name>mikem</user_name>
<email>mikem@i2b2.org</email>
</user>
</users>
</message_body>

Response Message for an Invalid User REquest

<response_header>
<result_status>
<status type="ERROR">Insufficient privileges.</status>
</result_status>
</response_header>