claims := credentials.Claims
	if _, ok := claims[ldapUser]; ok {
		return madmin.LDAPProvider // ldap users
	}

	if _, ok := claims[subClaim]; ok {
		providerPrefix, _, found := strings.Cut(credentials.ParentUser, getKeySeparator())
		if found {
			return providerPrefix // this is true for certificate and custom providers
		}
		return madmin.OpenIDProvider // openid users are already hashed, so no separator
	}