} else {
			bs, err := io.ReadAll(f)
			if err != nil {
				log.Fatalf("Error reading session policy file: %v", err)
			}
			policy = string(bs)
		}
		ldapOpts = append(ldapOpts, cr.LDAPIdentityPolicyOpt(policy))
	}
	if expiryDuration != 0 {
		ldapOpts = append(ldapOpts, cr.LDAPIdentityExpiryOpt(expiryDuration))
	}
	li, err := cr.NewLDAPIdentity(stsEndpoint, ldapUsername, ldapPassword, ldapOpts...)
	if err != nil {

			// Object does not exist error?
			if ldap.IsErrorWithCode(err, 32) {
				nonExistentUsers = append(nonExistentUsers, dn)
				continue
			}
			return nil, err
		}
		if len(searchResult.Entries) == 0 {
			// DN was not found - this means this user account is
			// expired.
			nonExistentUsers = append(nonExistentUsers, dn)
		}
	}
	return nonExistentUsers, nil
}