Return a path to the CA bundle which is used for verifying the hosts
        SSL certificate.

def _get_ca_bundle_path(self):
        """
        Return a path to the CA bundle which is used for verifying the hosts
        SSL certificate.
        """
        if self.ca_certs_bundle_path:
            # User provided a custom path
            return self.ca_certs_bundle_path

        # Return first bundle which is available
        for file_path in COMMON_CA_LOCATIONS:
            if self._is_valid_ca_bundle_file(file_path=file_path):
                return file_path

        return None