Cache it somewhere so we dont fetch it when creating a new playlist

[todo]

DJApp/app/src/main/java/com/mfriend/djapp/tempUi/PlaylistViewModel.kt

Lines 27 to 32 in f80a15f

	// TODO Cache it somewhere so we dont fetch it when creating a new playlist
	val userId = spotifyService.getCurrentUser().id
	val newPlaylist = PlaylistDTO(playlistName, "Playlist made by DJ App")
	val createdPlaylist = try {
	spotifyService.createPlaylist(newPlaylist, userId)
	} catch (e: HttpException) {

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This issue was generated by todo based on a TODO comment in f80a15f when #12 was merged. cc @mrf7.