def get_user(self):
        """
        Retrieve a name of the user which triggered this action execution.

        :rtype: ``str``
        """
        context = getattr(self, "context", {}) or {}
        user = context.get("user", cfg.CONF.system_user.user)

        return user

        Retrieve a name of the user which triggered this action execution.

        :rtype: ``str``
        
st2common/st2common/runners/base.py