# UpdateInstanceAuthConfigRequest
## Properties
**restricted_to_allowlist** | Option<**bool**> | Whether sign up is restricted to email addresses, phone numbers and usernames that are on the allowlist. | [optional][default to false]
**from_email_address** | Option<**String**> | The local part of the email address from which authentication-related emails (e.g. OTP code, magic links) will be sent. Only alphanumeric values are allowed. Note that this value should contain only the local part of the address (e.g. `foo` for `foo@example.com`). | [optional]
**progressive_sign_up** | Option<**bool**> | Enable the Progressive Sign Up algorithm. Refer to the [docs](https://clerk.com/docs/upgrade-guides/progressive-sign-up) for more info. | [optional]
**session_token_template** | Option<**String**> | The name of the JWT Template used to augment your session tokens. To disable this, pass an empty string. | [optional]
**enhanced_email_deliverability** | Option<**bool**> | The \"enhanced_email_deliverability\" feature will send emails from \"verifications@clerk.dev\" instead of your domain. This can be helpful if you do not have a high domain reputation. | [optional]
**test_mode** | Option<**bool**> | Toggles test mode for this instance, allowing the use of test email addresses and phone numbers. Defaults to true for development instances. | [optional]
[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)