// parsing alone.
func (l Config) ParsesAsDN(dn string) bool {
	_, err := ldap.ParseDN(dn)
	return err == nil
}

// IsLDAPUserDN determines if the given string could be a user DN from LDAP.
func (l Config) IsLDAPUserDN(user string) bool {
	udn, err := ldap.ParseDN(user)
	if err != nil {
		return false
	}
	for _, baseDN := range l.LDAP.GetUserDNSearchBaseDistNames() {

	}

	if sys.usersSysType != LDAPUsersSysType {
		return nil, errIAMActionNotAllowed
	}

	select {
	case <-sys.configLoaded:
		stsMap, err := sys.store.GetAllSTSUserMappings(sys.LDAPConfig.IsLDAPUserDN)
		if err != nil {
			return nil, err
		}
		ldapUsers := make(map[string]madmin.UserInfo, len(stsMap))
		for user, policy := range stsMap {
			ldapUsers[user] = madmin.UserInfo{
				PolicyName: policy,