1) No, the tutorial wasn't updated for this - but you can check out all the functions in the base implementation of the access handler, each function is documented on what it's doing.
2) Currently planned for next Friday (April 9), but you never know if something will postpone it for some time. E.g. I'm doing Unity 2021.1 compatibility tests next week, if there are issues it might delay the release.
3) There's no built-in node for that, but you could write a custom one to do it.
Please consider rating/reviewing my products on the Asset Store (hopefully positively), as that helps tremendously with getting found. If you're enjoying my products, updates and support, please consider supporting me on patreon.com!
2) Currently planned for next Friday (April 9), but you never know if something will postpone it for some time. E.g. I'm doing Unity 2021.1 compatibility tests next week, if there are issues it might delay the release.
3) There's no built-in node for that, but you could write a custom one to do it.
If you're enjoying my products, updates and support, please consider supporting me on patreon.com!