main.py

sp = spotipy.Spotify(
    auth_manager=SpotifyOAuth(
        scope="playlist-modify-private",
        redirect_uri="http://example.com",
        client_id=YOUR UNIQUE CLIENT ID,
        client_secret= YOUR UNIQUE CLIENT SECRET,
        show_dialog=True,
        cache_path="token.txt"
    )
)
user_id = sp.current_user()["id"]
date = input("Which year do you want to travel to? Type the date in this format YYYY-MM-DD: ")
song_uris = ["The list of", "song URIs", "you got by", "searching Spotify"]

playlist = sp.user_playlist_create(user=user_id, name=f"{date} Billboard 100", public=False)
# print(playlist)

sp.playlist_add_items(playlist_id=playlist["id"], items=song_uris)

I think now the billboard is only giving list to subscribers