Per summary, the Cloud Network Summary page should show the ems_ref id.
For AWS, at least, this seems to be the only unique key and thus what would be used programatically.
Can you look into adding ems_ref on cloud networks summary screen.
PR to fix this was merged: https://github.com/ManageIQ/manageiq-ui-classic/pull/1521
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.