Live chat - guest session doesn't destroyed after ending the chat

[Nasr2013]

In livechat gust can end the chat but still can return and use the chat- I noticed that (Storage: Meteor.loginToken has to be deleted to rest the livechat for the next visitor.

Could you please guide me, where and how I can delete this token.
Thank You,

[Nasr2013]

I did find a solution,
for(key in localStorage) {
delete localStorage[key];
}
return '';

[Nasr2013]

File to update:
..\packages\rocketchat-livechat\app\client\views\options.js
function Template.options.events({
'click .end-chat'() {