business object rest api access issue

Summary:

Hi,

I am trying to access the business objects ( just the get api) created in vbcs gen 3 (via Postman) , but I am not able to do it. I get the 403 Forbidden error.

Content (please ensure you mask any confidential information):

I used the same api as mentioned in the documentation here: ( tried the design/ rt/ live urls')

Also, I tried to use the oAuth that has been set up and working fine for the OIC gen 3 instance.

I checked the video mentioned in this thread, but that looks to be outdated as there is no direct Access Token settings visible in visual builder.