selfDN := cred.AccessKey
		if cred.ParentUser != "" {
			selfDN = cred.ParentUser
		}
		userList = append(userList, selfDN)
	}

	listType := r.Form.Get("listType")
	var listSTSKeys, listServiceAccounts bool
	switch listType {
	case madmin.AccessKeyListUsersOnly:
		listSTSKeys = false
		listServiceAccounts = false
	case madmin.AccessKeyListSTSOnly:
		listSTSKeys = true