Get Client Secret from: https://developer.spotify.com/dashboard/applications/4b50d1e6765f48ebb7dfcaf1b9437c2d
$Env:SPOTIPY_CLIENT_ID = "4b50d1e6765f48ebb7dfcaf1b9437c2d"
$Env:SPOTIPY_CLIENT_SECRET = "..."
On windows home machine, Python is not in path :/
Run with: C:\Users\Juha\AppData\Local\Programs\Python\Python39\python.exe .\analyze-playlist.py