This module provide a more easily way to get the hash_salt for your Drupal8 site.
Drupal8 require hash_salt in settings.php.
However, this value is not included in the backup generated by Pantheon.
To get the hash_salt of a site running on the Patheon, we have to use the terminus, but this is hard way for non-developers.
https://pantheon.io/docs/settings-php/
By using this module, you can restore your site from the pantheon to local environment without CLI.