AWS: Check resource existance

#!/bin/sh

regions=$(aws ec2 describe-regions --profile awslabs --region us-east-1  --query Regions[].RegionName --output text)

for region in $regions; do
    echo Checking $region
    aws rds describe-db-instances --region $region --profile awslabs --output text
    aws ec2 describe-instances --region $region --profile awslabs --output text
    aws ec2 describe-nat-gateways --region $region --profile awslabs --output text
    aws elb describe-load-balancers --region $region --profile awslabs --output text
done