Input plugin for AWS S3

I am new to telegraf and I am trying to use Telegraf cloudwatch plugin for retrieving AWS/S3 metrics and the plugin doesn’t seem to list any metrics for S3. It works for EC2 but not for S3. Buckets are already present for the credentials I used.

region = “us-west-2”
period = “24h”
delay = “5m”
interval = “5m”
namespace = “AWS/S3”
ratelimit = 20

Kindly help in resolving this issue