docs: def _GenerateCSRFKey(config):
    """Update a config with a random csrf key."""
    secret_key = config.Get("AdminUI.csrf_secret_key", None)
    if not secret_key:
      # TODO(amoser): Remove support for django_secret_key.
      secret_key = config.Get("AdminUI.django_secret_key", None)
      if secret_key:
        config.Set("AdminUI.csrf_secret_key", secret_key)
  
    if not secret_key:
      key = utils.GeneratePassphrase(length=100)
      config.Set("AdminUI.csrf_secret_key", key)
    else:
      print("Not updating csrf key as it is already set.")