CAPTCHA
CAPTCHA is an acronym for Completely Automated Public Turing test to tell Computers and Humans Apart. Use this widget to protect your website from spam and abuse. CAPTCHA is a test that users fill out before submitting a form.
The CAPTCHA widget does not come out-of-the box with ASP.NET Core form widgets.
If you want to use one on your form, you can implement a custom CAPTCHA widget, based of Google reCAPTCHA.
To do this, follow procedure Create a custom CAPTCHA Forms widget.