问Spotify web API经常出现500个错误

EN

http status: 500, code:-1 - the requested resource could not be found: https://api.spotify.com/v1/users/[USERNAME]/playlists

client_id = '' 
client_secret = ''
redirect_uri = 'http://127.0.0.1:8000/spotify/'
scope = 'playlist-read-private user-read-private playlist-modify-private'
auth = oauth2.SpotifyOAuth(client_id, client_secret, redirect_uri, scope = scope)

def spotify_auth(request):
    auth_url = auth.get_authorize_url()
    return HttpResponseRedirect(auth_url)

def spotify(request):
    token_code = request.GET.get('code')
    token = auth.get_access_token(token_code)
    sp = spotipy.Spotify(auth=token['access_token'])
    user = sp.me()
    playlists = sp.user_playlists(user['id'])