Fetch list of device ids for a user via API (especially webrtc device ids)

Customers would like to be able to forward calls to a soft-phone or WebRTC device. Technically one can already forward calls to a device ID corresponding to desk (physical) phone because their device IDs are static. WebRTC device IDs are dynamic and volatile. Our system could route calls to them, but there is no way to obtain a list of Device IDs associated with a user.

To facilitate a transfer one would:

• Look up user's device IDs

• Find the device ID associated with WebRTC

• Call Forward Call API to transfer call to that device ID

This idea is specifically for an API that would let a developer lookup a user's list of device IDs.