How do I authorize the API using access _ code?

Hi everyone.

I am using CMS 2.0.4.
I want to know how to authorize the API using access _ code.
I don’t know the specific setting contents even if I check the community or the document.
https://xibo.org.uk/docs/developer/cms-api-overview

I currently use client _ credentials to obtain the acccess_token as follows:.

How do I change this?
I would appreciate it if you could tell me the setting example.

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