How to call standard experience site login form?

I am running following function in helper.js Lightening component. It is opening  https://www.xxxxxxx.com/s/login page instead of https://www.xxxxxxx.com/login.

var urlEvent = $A.get("e.force:navigateToURL"); urlEvent.setParams({ "url": "/login"}); urlEvent.fire();

Regards,

#Lightning Component  #Salesforce Developer