Reworked VPC checking for users that only have one VPC
Reworked VPC checking for users that only have one VPC

cianfrocco-lab/cryoem-cloud-tools,leschzinerlab/AWS,cianfrocco-lab/cryoem-cloud-tools,cianfrocco-lab/cryoem-cloud-tools,cianfrocco-lab/cryoem-cloud-tools,cianfrocco-lab/cryoem-cloud-tools,leschzinerlab/AWS,cianfrocco-lab/cryoem-cloud-tools