void CheckResult(IdentityResult?result, string?field = null) { if (string.IsNullOrEmpty(field)) { field = $"'{field}'"; } if (result == null) { _customValidator.Add($"missing result for updating field {field}"); } else if (result.Succeeded) { _customValidator.Add($"updated field {field}"); } else { foreach (var err in result.Errors) { _customValidator.Add($"({err.Code}) {err.Description}"); } } }