issue collector in jira

[gangadhar_rayudu]

I would raise a task with user filled summary and description. But issue always be assigned to one dedicated user.

I am able to raise jira task from my webapp but unable to assign to user.

<script type="text/javascript">window.ATL_JQ_PAGE_PROPS = $.extend(window.ATL_JQ_PAGE_PROPS, {

	// ==== custom trigger function ====
	triggerFunction : function( showCollectorDialog ) {
		$('#myRequest').on( 'click', function(e) {
			e.preventDefault();
			showCollectorDialog();
		}); 
	},
	// ==== we add the code below to set the field values ====
	fieldValues: {
 		"summary" : " Testing",
		"assignee" : "xxxx",
		"description" : "Testing",
 		"priority" : "3",
	}					
});</script>

assignee not working. can you please help?