Save Downloaded File to Disk Helper Function

        :param save_file_at: Path of where to save the file.
        :param file_stream: File stream
        :param filename: Name to save the file.

def save_downloaded_file(filename, save_file_at, file_stream):
        """ Save Downloaded File to Disk Helper Function

        :param save_file_at: Path of where to save the file.
        :param file_stream: File stream
        :param filename: Name to save the file.
        """
        filename = os.path.join(save_file_at, filename)
        with open(filename, 'wb') as f:
            f.write(file_stream)
            f.flush()