How to create a script that shows a list of groups that a user has

[Carlos]

I'm trying to build a Topic for the Virtual Agent where there's a selection of a list of users that belongs to a manager, this part I've got it working, but when I select one user from the previous list I want to be able to see the groups that are related to the user selected:

(function execute(table) {

var options = [];

var mem_groups = [];

var groups = new GlideRecord("sys_user_grmember");

groups.addActiveQuery();

groups.addQuery("user", gs.getUserID());

groups.query();

var member_groups = new GlideRecord("sys_user_grmember");

member_groups.addQuery("user",vaInputs.member);

member_groups.query();

while(member_groups.next()){

mem_groups.push(member_groups.group.sys_id.toString());

}

while(groups.next()){

var gr = groups.getValue("group").toString();

if(mem_groups.indexOf(gr) == -1){

options.push({ 'value': groups.getValue("group"), 'label': groups.group.name });

}

}

options.push({ 'value': "", 'label': "None of these" });

return options;

})(table)