Ory is the largest open source community in the world for cloud software application security. We maintain advanced open source security software solving authentication, authorization, access control, application network security, and delegation. Ory implements a variety of industry and best-practice standards including OAuth 2.0 / OAuth 2.1, OpenID Connect, Zero Trust Networking, Google Zanzibar Policy Framework, FIDO2 U2F, WebAuthn, TOTP, and more.

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is transient_payload feature in the open source <@U04UQ68083H>

Yes, the `transient_payload` feature is part of the Ory open-source identity and access management solution. It is used to pass data from the registration or login process to hooks and email templates. This feature is mentioned in the API documentation for various methods such as `getRegistrationFlow`, `updateRegistrationFlow`, `createNativeRegistrationFlow`, `createBrowserRegistrationFlow`, and `updateLoginFlow`.  For example, in the [updateLoginFlow method](<https://www.ory.sh/docs/kratos/reference/api>), the `transient_payload` is described as "Transient data to pass along to any webhooks". Similarly, in the [getRegistrationFlow method](<https://www.ory.sh/docs/kratos/reference/api>), it is described as "TransientPayload is used to pass data from the registration to a webhook".  Please note that the exact usage and behavior of `transient_payload` might depend on the specific context and configuration of your Ory setup.