def get_user_groups(self, user):
        """
        Get user's group memberships.

        Args:
            user (string): User name.

        Returns:
            (list): User's groups.

        Raises:
            requests.HTTPError on failure.
        """
        self.project_service.set_auth(self._token_project)
        return self.project_service.get_user_groups(user)