Popup missing from login page

Hello there,
The plugin seems to work well, but does not display the prompt on the login page, which isn’t ideal where users have been pre-registered.
Would it be possible to fix this by adding the following to the init function, possibly including an admin settings option to enable/disable?
Many thanks,
Chris

add_action ( 'login_enqueue_scripts', array ( $this, 'enqueue_scripts' ) );
add_action ( 'login_head', array ( $this, 'add_css' ) );
add_action ( 'login_footer', array ( $this, 'add_js' ), 1000 );
add_action ( 'login_footer', array ( $this, 'add_notification_bar' ), 1000 );