Script to find the elastic cache services that are not tagged with the specific tag in aws

aws_es_tags_finder.sh

#!/bin/bash
declare -a test
test=(`aws elasticache describe-cache-clusters | grep CacheClusterId | awk -F '"'  '{print $4}'`)
i=0
while [ $i -lt ${#test[@]} ]
do
a=`aws elasticache list-tags-for-resource  --resource-name arn:aws:elasticache:<Region>:<Account ID>:cluster:${test[$i]}| grep -w <KEY/Value of Tag >`
if [ -z "$a" ]
then
 echo "${test[$i]} does not have tag "
fi
i=`expr $i + 1`
done