Error detection on create_playlist call to ytmusicapi

spotify2ytmusic/cli.py

@@ -174,17 +174,22 @@ def parse_arguments():
     src_pl_id = args.spotify_playlist_id
     dst_pl_id = args.ytmusic_playlist_id
 
+    yt = get_ytmusic()
     if dst_pl_id.startswith("+"):
-        yt = get_ytmusic()
         pl_name = dst_pl_id[1:]
 
         dst_pl_id = get_playlist_id_by_name(yt, pl_name)
         print(f"Looking up playlist '{pl_name}': id={dst_pl_id}")
         if dst_pl_id is None:
             dst_pl_id = yt.create_playlist(title=pl_name, description=pl_name)
+
+            #  create_playlist returns a dict if there was an error
+            if isinstance(dst_pl_id, dict):
+                print(f"ERROR: Failed to create playlist: {dst_pl_id}")
+                sys.exit(1)
             print(f"NOTE: Created playlist '{pl_name}' with ID: {dst_pl_id}")
 
-    copier(src_pl_id, dst_pl_id, args.dry_run, args.track_sleep)
+    copier(src_pl_id, dst_pl_id, args.dry_run, args.track_sleep, yt=yt)
 
 
 def copier(
@@ -193,8 +198,11 @@ def copier(
     dry_run: bool = False,
     track_sleep: float = 0.1,
     spotify_playlist_file: str = "playlists.json",
+    *,
+    yt: Optional[YTMusic] = None,
 ):
-    yt = get_ytmusic()
+    if yt is None:
+        yt = get_ytmusic()
 
     spotify_pls = json.load(open(spotify_playlist_file, "r"))
     if dst_pl_id is not None: