Set the specific user in the list collector in the catalog item.

[Supriya KM]

Hello Everyone,

I have a list collector field taking sys_user table. I have written a script include with the specific assignment group and all the members are getting populated in the form as expected. 
But now I have a requirement where I need one specific user from the assignment group in the list collector and that user needs approval.
Existing : Select multiple members in the list collector and approvals are being sent from the workflow.
Required: Now I need if "X" choice is selected in the another variable I need specific user to be populated in the list collector and to send for approval.
Please help me with this.
Code in the workflow (approval user):

answer = [];

var approvers = current.variables.list_collector_field_name.toString();

var list = approvers.split(',');

for (var i = 0; i < list.length; i++) {

    answer.push(list[i]);

}

[Brad Bowman]

If you want to do this in the approval script, at the end of this script you would add something like this to push this other user's sys_id to the list collector value and approval:

if (current.variables.variable_name == 'variable_value') {
    answer.push('sys_id of additional user'); //or get this from a system property
    current.variables.list_collector_field_name += ',' + 'sys_id of additional user');
}