template level meteror method for user details select

useridea.js

Template.chatItem.onCreated(function() {
    var instance =  Template.instance();
    instance.member = new ReactiveVar();
    instance.autorun(function() {
        var id = this.userId;
        Meteor.call('getMember', id, function(err, data) {
            instance.member.set(data);
        });
    });
});
 
Template.chatItem.helpers({
    member: function() {
        return Template.instance().member.get();
    }
});