My Emby server‘s version is 4.7.0.6 I found I can use  https://{host:port}/emby/Audio/{item_number}/universal?UserId=1   to access  all my audios in my Emby server https://{host:port}/emby/Items/{item_number}/Images/Primary?maxWidth=2561&quality=90 to access all my pictures and photos  https://{host:port}/emby/videos/{item_number}/stream.mp4  to access all my movies and videos without any authentication   It means if I knows someone's Emby server's host add