public async void ShouldFollowAPlaylist() { await SetupCredentials(); //https://open.spotify.com/user/rollingstonesmusic/playlist/06m5HzAGIkYyLsDdNpWoCp RegularError res = await Endpoints.FollowAPlaylist(Creds.Access_token, "rollingstonesmusic", Playlist_NoFollow); Assert.False(res.WasError, "Object Error"); IReadOnlyList <bool> bools = await Endpoints.CheckUsersFollowsPlaylist(Creds.Access_token, "rollingstonesmusic", Playlist_NoFollow, new string[] { CurrentUserId }); Assert.True(bools[0], $"Expected to follow playlist {Playlist_NoFollow}, but don't"); //Restoring to default state await Endpoints.UnfollowAPlaylist(Creds.Access_token, "rollingstonesmusic", Playlist_NoFollow); }