Update playlists_mismatch.py

playlists_mismatch.py

@@ -1,6 +1,9 @@
 from urllib.parse import urlparse, parse_qs
 import re
 
+import os
+api_key = os.getenv("api_key_secret")
+youtube = build('youtube', 'v3', developerKey=api_key)
 def playlists_mismatch_func(playlistlink1, playlistlink2, output = 'link'):
     """Return the ids of videos that are only one of the playlists, and not in the other"""