Using Workflow's HTTP Request Action to Work With IdentityNow APIs

Hi, perhaps a new thread should be started but trying here first.
It works fine to use as described in this guide, however I would like to not use my personal token. Instead I have created client credentials from global → security settings → API Management and gotten my credentials and set all possible scopes. But when I try using these credentials I get error 403, forbidden.
I have tried without setting scope and with “sp:scopes:default sp:scopes:all”.

Is it not possible to use this kind of credentials or am I doing something wrong? Since it works with my personal token I guess former…