improved error handling when listing regions

prowler

@@ -295,7 +295,8 @@ TOTAL_CHECKS=($(echo "${TOTAL_CHECKS[*]}" | tr ' ' '\n' | awk '!seen[$0]++' | so
 get_regions() {
   # Get list of regions based on include/whoami
   REGIONS=$($AWSCLI ec2 describe-regions --query 'Regions[].RegionName' --output text $PROFILE_OPT --region $REGION_FOR_STS --region-names $FILTERREGION 2>&1)
-  if [[ $(echo "$REGIONS" | grep 'AccessDenied\|UnauthorizedOperation') ]]; then
+  ret=$?
+  if [[ $ret -ne 0 ]]; then
     echo "$OPTRED Access Denied trying to describe regions! Review permissions as described here: https://github.com/toniblyx/prowler/#requirements-and-installation $OPTNORMAL"
     EXITCODE=1
     exit $EXITCODE