https://blogs.sap.com/2018/03/12/part-1-secure-connectivity-oauth-to-sap-cloud-platform-integration/

https://blogs.sap.com/2019/04/25/fetch-oauth-token-in-rest-is-now-out-of-the-box/

How to test OAuth authentication via Postman - SuccessFactors Integrations

https://apps.support.sap.com/sap/support/knowledge/public/en/2800150

Live Data Connection to SAP S/4HANA Cloud Edition via OAuth

https://help.sap.com/doc/00f68c2e08b941f081002fd3691d86a7/2019.2/en-US/0485d540e0b340a0bc0da86fe368997c.html