GenerateVPCByID will return a VPC with CIDRpool and subnets If you know the vpc ID on AWS, then try to generate it.

GenerateVPCBySubnet will return a VPC with CIDRpool and subnets based on one of the subnet ID If you know the subnet ID on AWS, then try to generate it on AWS.

PrepareVPC will find a vpc named <vpcName> If there is no vpc in the name It will Create vpc with the name in the region checkExisting means if you want to check current existing vpc to re-use.

************************** Subnet ****************************.

************************* CIDR Pool *************************.

**************************** VPC ******************************.