On success, contains the list of requested virtual cards.
On partial success, contains the list of virtual cards that
were fetched and unsealed successfully as well as the list of
virtual cards that could not be unsealed successfully and
the error indicating why unsealing failed. An virtual card
may fail to unseal if the client version is not up to date
or the required cryptographic key is missing from the client
device.
On failure, contains an error object indicating why the list
operation failed.
The result object for list virtual cards APIs.