code: def list_supported_categories():
    
    categories = get_supported_categories(api)
    category_names = [category.name for category in categories]
    print ("Supported account categories by name: {0}".format(
      COMMA_WITH_SPACE.join(map(str, category_names))))
docs: Prints a list of supported external account category names.
    For example, "AWS" is a supported external account category name.