def make_refresh_token_request_headers(self):
        """Generating specific headers only for refreshing access key API call."""
        authorization_header_value = base64.b64encode("{0}:{1}".format(self.email, self.password).encode())
        headers = {
            "Authorization": "Basic-Cloud {encoded_header}".format(
                encoded_header=authorization_header_value.decode("ascii")
            ),
            "x-mc-app-id": self.app_id,
            "Content-Type": "application/json",
            "x-mc-api-version": "2014.6.1",
        }
        return headers
Generating specific headers only for refreshing access key API call.
Solutions/MimecastTTP/Data Connectors/Helpers/request_helper.py