This module allows the user registration and login using same form by sending a verifying one time login link to the user.
Every time user submits the form with email id, a new verification link is generated and sent to the email. Previous links automatically gets discarded and will not work. Login link is valid for 24 hrs only.
User can request login links for n number of times.
Install as you would normally install a contributed Drupal module.
Simply Enable module from /admin/modules page.