Prebuild user cache

add_action('swift_performance_prebuild_cache_hit', function(){
    // Get all users here
    foreach (get_users() as $user){
        add_filter('swift_performance_prebuild_headers', function($headers) use ($user){
                $headers[LOGGED_IN_COOKIE] = wp_generate_auth_cookie($user->id);
                return $headers;
        });
        Swift_Performance::prebuild_cache_hit($permalink);
        remove_all_filters('swift_performance_prebuild_headers');
    }
});