The `Auth` record in the `EnvelopeGenerator.Server.Models`
namespace has been marked as `[Obsolete]` with the message
"Use auth DTO" to indicate it is outdated and should be
replaced with a newer implementation.
The `Auth` record includes the following properties:
- `AccessCode`, `SmsCode`, `AuthenticatorCode` (nullable strings)
- `UserSelectSMS` (boolean)
Additionally, it defines computed properties `HasAccessCode`
and `HasSmsCode` to check for the presence of `AccessCode`
and `SmsCode`, respectively.