Private member page

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You can do it without plugins, you just have to allow subscribers to see Private posts and pages, depending on what you want, so you have to put this code in your functions.php

$subRole = get_role( 'subscriber' );
$subRole->add_cap( 'read_private_posts' );
$subRole->add_cap( 'read_private_pages' );

And then simply create a private post or page and it will works as expected. Tested.