def download_email_original_file(self, email_id, certificate_id, path):
        connection = Connection(self.token)

        connection.set_url(self.production, self.EMAILS_ORIGINAL % (email_id, certificate_id))

        response, headers = connection.file_request()

        if headers['content-type'] == 'application/json':
            return response

        f = open(path, 'w')
        f.write(response)
        f.close()
    def download_audit_trail(self, signature_id, document_id, path):
        """
        Get the audit trail of concrete document
        @signature_id: Id of signature
        @document_id: Id of document
        @path: Path where the document will be stored
        """
        connection = Connection(self.token)
        connection.set_url(self.production, self.SIGNS_DOCUMENTS_AUDIT_URL % (signature_id, document_id))

        response, headers = connection.file_request()

        if headers['content-type'] == 'application/json':
            return response

        f = open(path, 'w')
        f.write(response)
        f.close()