Get parameters from Simple Systems Manager

        Args:
            p - a parameter name

        Returns:
            a value, decrypted if needed, if successful or None if things go
            sideways.

def _get_ssm_parameter(self, p):
        """
        Get parameters from Simple Systems Manager

        Args:
            p - a parameter name

        Returns:
            a value, decrypted if needed, if successful or None if things go
            sideways.
        """
        try:
            response = self._ssm.get_parameter(Name=p, WithDecryption=True)
            return response.get('Parameter', {}).get('Value', None)
        except Exception as ruh_roh:
            logging.error(ruh_roh, exc_info=False)

        return None