Update app.py

app.py

@@ -26,6 +26,8 @@ def spotify_auth(client_id, client_secret, code=None):
                                 redirect_uri=redirect_uri, 
                                 scope=scope)
     if code:
+        parsed_url = urlparse(code)
+        code = parse_qs(parsed_url.query)['code'][0]
         auth_manager.get_access_token(code=code, as_dict=False)
         sp = spotipy.Spotify(auth_manager=auth_manager)
         devices = sp.devices()