Files are uploaded using plugin but cant find files in media

I am using my plugin to retrieve files from a webservices and save them into my wordpress, it properly works and save them into the upload directory but I cant find them in media library.

my code is as following

require("/Applications/MAMP/htdocs/wordpress/wp-load.php");

$Addr = "https://www.xxx.com" . $Addr;
$ch = curl_init();
curl_setopt($ch, CURLOPT_POST, 0);
curl_setopt($ch, CURLOPT_URL, $Addr);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$output = curl_exec($ch);
curl_close($ch);

ini_set( 'display_errors', TRUE );
error_reporting( E_ALL );

$upload_dir = wp_upload_dir();
$location= $upload_dir['basedir']. "/" . "a.jpg";

file_put_contents($location, $output);
echo 'Photo is uploaded';