We are trying to create a device using http://localhost:8888/restconf/operations/netconf-node-topology:create-device api call assuming "yang-library" is optional which is resulting error "RPC implementation failed: java.lang.NullPointerException: Supplied value may not be null".
Please let us if we are using the right api call to create device.
We are using https://github.com/PANTHEONtech/lighty-netconf-simulator to create device.