Hello everyone,
I was unable to get it to work using that method from the website. What I did was use the service Anymote smart remote.
When making a new applet make sure you click "this" (Google assistant) and "that"(whichever service you choose)
One note I would like to say about the first link: on the third step the service you can use for making a web request Is Webhooks. (Took a little while to get that)
There are a ton of services and different ways to create traders. Hopefully this helps out. :-)