SAP user id for api_sales_order_simulation_srv

Hi,

We are utilizing SAP S/4 Hana connected premise edition. I would similar to recognize wherever I tin support linkage betwixt the API telephone and inheritance idiosyncratic id.

api_sales_order_simulation_srv is synchronous telephone from postman we tin usage the OAUTH 2.0 but successful SAP it needs to make a income bid without saving, for this we request a SAP idiosyncratic ID. Is my knowing correct? If truthful wherever tin I support the linkage?

Thanks,

Bharath