post deprecated
https://example.com/network-config/v1alpha1/device-collection-add-devices
(Deprecated) This API will add devices to a device collection. Use /network-config/v1alpha1/device-groups-add-devices instead.
Important: This API is supported only in Central On-Prem and standalone Central accounts. If your Central account has both Classic Central & Central (i.e. if you see the Classic Central toggle in the UI), this API is not supported & will not work.