async fn add_tags_to_resource(
        &self,
        input: AddTagsToResourceMessage,
    ) -> Result<TagListMessage, RusotoError<AddTagsToResourceError>> {
        let mut request = SignedRequest::new("POST", "elasticache", &self.region, "/");
        let params = self.new_params("AddTagsToResource");
        let mut params = params;
        AddTagsToResourceMessageSerializer::serialize(&mut params, "", &input);
        request.set_payload(Some(serde_urlencoded::to_string(&params).unwrap()));
        request.set_content_type("application/x-www-form-urlencoded".to_owned());

        let response = self
            .sign_and_dispatch(request, AddTagsToResourceError::from_response)
            .await?;

        let mut response = response;
        let result = xml_util::parse_response(&mut response, |actual_tag_name, stack| {
            xml_util::start_element(actual_tag_name, stack)?;
            let result = TagListMessageDeserializer::deserialize("AddTagsToResourceResult", stack)?;
            skip_tree(stack);
            xml_util::end_element(actual_tag_name, stack)?;
            Ok(result)
        })
        .await?;

        drop(response); // parse non-payload
        Ok(result)
    }
<p>A tag is a key-value pair where the key and value are case-sensitive. You can use tags to categorize and track all your ElastiCache resources, with the exception of global replication group. When you add or remove tags on replication groups, those actions will be replicated to all nodes in the replication group. For more information, see <a href="http://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/IAM.ResourceLevelPermissions.html">Resource-level permissions</a>.</p> <p> For example, you can use cost-allocation tags to your ElastiCache resources, AWS generates a cost allocation report as a comma-separated value (CSV) file with your usage and costs aggregated by your tags. You can apply tags that represent business categories (such as cost centers, application names, or owners) to organize your costs across multiple services.</p> <p>For more information, see <a href="https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Tagging.html">Using Cost Allocation Tags in Amazon ElastiCache</a> in the <i>ElastiCache User Guide</i>.</p>
rusoto/services/elasticache/src/generated.rs