Using webservice in CPQ Running in Fusion

Summary:

In CPQ Running in Fusion, how to call CPQ webservices

Content (please ensure you mask any confidential information):

We want to call CPQ webservices, CPQ is running in Fusion. In standalone CPQ, we used to create a dedicated web services for which SSO was disabled and we used to use basic authentication.

What needs to be done for CPQ running in Fusion. Using Fusion username and password gives 401 error. I assume we need to get some kind of token. Any idea how?

Version (include the version you are using, if applicable):
26C

Code Snippet (add any code snippets that support your topic, if applicable):