How to get secret key in ReCAPTCHA v.3 enterprise

[Domeo]

We are trying to setup ReCAPTCHA in Google Enterprise, and the system is asking for a secret key. Where we can locate it?

I've already followed the steps in here: https://cloud.google.com/recaptcha-enterprise/docs/create-key

i am seeing no metrics here: https://console.cloud.google.com/security/recaptcha/