public function docs() {
//custom logic
//check if user is logged in or user have permission to download this file etc
return response()->download(
storage_path('app/users/documents/4YPa0bl0L01ey2jO2CTVzlfuBcrNyHE2TV8xakPk.png'),
'filename.png',
['Content-Type' => 'image/png']
);
}