API to update the GST vendor classifiaction field in sap s4hana cloud

Hi Experts,

We have a requirement to update the GST vendor classification field in maintain business partner application followed by BP role* Supplier (Fin.Accounting)-> Vendor Country Spec. Enh 2 tab with the help of API.

Could you please let us know If sap provide any such API and the path where we could find this.

Also if there is no such API could you let us know the approach we could follow to update this field coming through third party system via boomi.

Note: Currently we are using A_BusinessPartner API to create BP in sap s4hana cloud