returns xml fragment.
<response success="true" error="">
if success attribute is "true", the subscribers has been retrived successfully like the xml below.
if success attribute is "false", the error attribute indicates the encountered error.
<response success="TRUE" error="">
<subscribers>
<usersubscriber>
<userid>10119</userid>
<username>adamb</username>
<firstname>Adam</firstname>
<lastname>Boeve</lastname>
<email>adamb@inforouter.com</email>
<emailtype />
<language />
<attachdocumenttoemail>FALSE</attachdocumenttoemail>
<userstatus>1</userstatus>
<on_read>TRUE</on_read>
<on_read>TRUE</on_read>
<on_update>TRUE</on_update>
<on_checkout>TRUE</on_checkout>
<on_approve>FALSE</on_approve>
<on_reject>FALSE</on_reject>
<on_comment>TRUE</on_comment>
<on_move>FALSE</on_move>
<on_delete>FALSE</on_delete>
<on_checkin>FALSE</on_checkin>
<on_newdoc>FALSE</on_newdoc>
</usersubscriber>
<usersubscriber>
<userid>10243</userid>
<username>diannaf</username>
<firstname>Dianna</firstname>
<lastname>Finch</lastname>
<email>diannaf@inforouter.com</email>
<emailtype>HTML</emailtype>
<language />
<attachdocumenttoemail>FALSE</attachdocumenttoemail>
<userstatus>1</userstatus>
<on_read>TRUE</on_read>
<on_read>TRUE</on_read>
<on_update>TRUE</on_update>
<on_checkout>TRUE</on_checkout>
<on_approve>FALSE</on_approve>
<on_reject>FALSE</on_reject>
<on_comment>TRUE</on_comment>
<on_move>FALSE</on_move>
<on_delete>FALSE</on_delete>
<on_checkin>FALSE</on_checkin>
<on_newdoc>FALSE</on_newdoc>
</usersubscriber>
</subscribers>
</response>