if objectAPI == nil {
		return
	}

	// Validate API arguments.
	q := madmin.PolicyEntitiesQuery{
		Users:  r.Form["user"],
		Groups: r.Form["group"],
		Policy: r.Form["policy"],
	}

	// Query IAM
	res, err := globalIAMSys.QueryPolicyEntities(r.Context(), q)
	if err != nil {
		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)