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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```hook: web_hook # To use webhooks, you must set 'hook' to 'web_hook'
config:
  url: <https://test.hook.site.sh/before_login_hook> # Webhook URL.
  method: POST # HTTP method used to send request to the webhook URL.
  body: <base64://ENCODED_JSONNET>```
what does base 64 encoded jsonnet mean.
I have jsonnet file, so shoule I provide a path to it or do I have to run some operation before doing it.

You must encode the Jsonnet to B64 and paste the string you get after the `base64://` “prefix”

You can use an online tool like this one to encode
<https://www.base64decode.org/>

In javascript: ``base64://${Buffer.from("function(ctx) ctx").toString("base64")}``

or in shell:
```base64 &lt; config.jsonnet```