Using External API to generate a token key?

I'm using an API that requires an 'access token'. This token is designed to expire every 60 minutes which means I'll need to build something into my workflow that generates a new key regularly.

The service provider for this API provides documentation on how to generate this 'access token'. However, I'm first required to obtain a 'token-key' which is an 87-character string.
[image.png][image.png]
I'm a noob when it comes to API security outside of the typical header keys, so I'm not sure exactly what to do with the information they are giving me since there is no address. Is there some type of terminal I'm supposed to be using?