type error = | Aborted |
| AccountDisabled |
| CredentialsExpired |
| EncryptionRequired |
| IncorrectEncoding |
| InvalidAuthzid |
| InvalidMechanism |
| MalformedRequest |
| MechanismTooWeak |
| NotAuthorized |
| TemporaryAuthFailure |
exception SaslFailure of error * string option