EnumerateVPC lists the VPCs available to the caller and returns a Report struct for each specified region.

EnumerateVPCForRegion lists the VPCs available to the caller for a particular regionand returns a Report struct.

The Instance struct contains the VPC data that was enumerated, wrapping the AWS values.

The Report struct contains the account ID that the VPCs were discovered in, the resources themselves, and any non-fatal errors that occurred during the execution of the `methodaws vpc enumerate` subcommand.