fix error in make_metadata_request logging
fix error in make_metadata_request logging

simon-weber/Unofficial-Google-Music-API,nvbn/Unofficial-Google-Music-API,TheOpenDevProject/gmusicapi,peetahzee/Unofficial-Google-Music-API,tanhaiwang/gmusicapi,dvirtz/gmusicapi,dvirtz/gmusicapi,jimyx17/gmusic,thebigmunch/gmusicapi,simon-weber/gmusicapi