you can find your workload API path in Rancher2.x web UI-->Cluster->Project->Resources->Workloads,
copy the workload link address, eg:
http://localhost/p/c-h4hxd:p-dwqfr/workload/deployment:jenkins:jenkins
or click the menu icon and select "View in API", will open in new browser tab. copy that url to here.
since endpoint part has bean set in Credential, you only need specify path from "/p/" or "/project", eg:
/project/c-h4hxd:p-c9j8z/workloads/deployment:default:busybox
or /p/c-h4hxd:p-dwqfr/workload/deployment:jenkins:jenkins