Sage 200 API Authorization Endpoint

We're developing a web application to push data to hosted Sage 200 API - all is setup, but we're looking to generate authorization tokens for this, and the URL we would hit doesn't appear to be documented anywhere.

The Spanish version shows us the process - docs here: https://developer.sage.com/api/200/esp/guides/authentication-regular-web-applications/

UK docs show "coming soon" - but we're looking to generate tokens now, and understand from library code that this is possible. Looking for help with the endpoint we should be using for this.

Feedback: Working code examples including the test keys which were provided on subscription would be beneficial - particularly as we need to supply a token to make any API request; generating a token is obviously important.