First of all, please install this plugin and activate it.
Then, if you want to change the lock idle time for the password protected page, please input the value of “Idle time for Password Protected Cookie”.
About the detail information, Please see “WP Hidden Password Protected Pages Settings” in Setting menu.
deveploping version: https://github.com/kimipooh/wp-hidden-password-protected-pages
When the plugin is turned on, the password protected pages will be hidden. The user who knows the access URL continues to be able to access to the pages.
Optional settings: The unlocked password protected page will be locked again after the idle time (Value of Idle time for Password Protected Pages).
