As we have AWS Signature option in Authorization standard types, I’d like to ask for Microsoft Azure Active Directory authentication for Role Based Access Controll implementation. It is based on client_credentials oAuth2.0 grant flow. It is documented here: https://docs.microsoft.com/en-us/azure/active-directory/develop/active-directory-protocols-oauth-service-to-service
I have Pre-request Script written and ready to use: https://lnx.azurewebsites.net/postman-pre-request-script-for-azure-rest-api-client-credential-grant/ - feel free to use it. Only thing we need is to list this option in Authorization types drop-down list. After choosing this option, we need to have three inputs for client_id, client_secret and tenant. The implementation is really simple.
I can help with this topic from Azure perspective - just contact me.