// query their groups:
		opts.claims[ldapUserN] = targetUser // simple username
		targetUser, targetGroups, err = globalIAMSys.LDAPConfig.LookupUserDN(targetUser)
		if err != nil {
			writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
			return
		}
		opts.claims[ldapUser] = targetUser // username DN

		// NOTE: if not using LDAP, then internal IDP or open ID is