You are using below URLs to approve and reject workflows:
https://apixx.xxxx.xxx/odata/v2/approveWfRequest?wfRequestId=<WorkflowId>L (approver = logon user which you have configured in EC)
https://apixx.xxxx.xxx/odata/v2/rejectWfRequest?wfRequestId=<WorkflowId>L (approver = logon user which you have configured in EC)
As per your requirement, you need common user-Id so that the workflow request can be approved/rejected apart from the respective assigned approver.
Delegate Workflows, Workflow API, ODATA , KBA , LOD-SF-INT-ODATA , OData API Framework , LOD-SF-INT , Integrations , LOD-SF-EC , Employee Central , LOD-SF-EC-WFL , Workflows - Configuration, Tools, Objects & Rules , How To
About this pageThis is a preview of a SAP Knowledge Base Article. Click more to access the full version on SAP ONE Support launchpad (Login required).
Search for additional results
Visit SAP Support Portal's SAP Notes and KBA Search.