How to Authenticate and Call Commerce Scale Unit APIs in Self-Hosted Mode

Question

I followed this guide to set up the Commerce Scale Unit in self-hosted mode for my local development environment. My goal is developing an extension. I'm trying to call the following API using Postman: http://localhost:446/Commerce/Customers('2001')?api-version=7.3 I'm sending the request with the following headers:

• Oun: 068

• No authentication token included

However, the request returns a 401 Unauthorized error.

The response is the following:

{
  "TypeName": "UserAuthenticationException",
  "Exception": "{\r\n  \"ErrorResourceId\": \"Microsoft_Dynamics_Commerce_Runtime_AuthenticationFailed\",\r\n  \"LocalizedMessage\": \"A server side error occurred that prevent user from logging on. This may be due to one or more reasons; the user name or password may be incorrect. Please check the server log for detailed information or contact your system administrator.\"\r\n}",
  "CorrelationId": "c899f9b2-86c4-4f1a-bf16-b0cb1d11166a"
}

My questions:

• How can I correctly call the Commerce Scale Unit APIs in self-hosted mode?
• If authentication is required for local development, how can I configure it properly?

Any guidance or references would be greatly appreciated! Thanks in advance.