Trying to install API using Public, Secrete and Client ID

I am trying to follow these instructions for implementing this api into my web page, I add advice how to use the API connector tool with these instructions.

I have a Public Signing KEY , Client ID, and a Secret ID. I cant seem to find a portion to connect on the Api connector that uses these all. Also I have a page with a Varify button.

I can not seem to figure out how to “when Verify” is clicked to send the call to the API in workflow… it does not appear.

With in the Api Connector I have filled this data out in two different trials

I would really love any help, step by step would be amazing as I get lost fast.

Picture of what the work flow looks like now, and I cant find the API connector in plug ins.