async fn get_aws_default_service_quota(
        &self,
        input: GetAWSDefaultServiceQuotaRequest,
    ) -> Result<GetAWSDefaultServiceQuotaResponse, RusotoError<GetAWSDefaultServiceQuotaError>>
    {
        let mut request = self.new_signed_request("POST", "/");
        request.add_header(
            "x-amz-target",
            "ServiceQuotasV20190624.GetAWSDefaultServiceQuota",
        );
        let encoded = serde_json::to_string(&input).unwrap();
        request.set_payload(Some(encoded));

        let response = self
            .sign_and_dispatch(request, GetAWSDefaultServiceQuotaError::from_response)
            .await?;
        let mut response = response;
        let response = response.buffer().await.map_err(RusotoError::HttpDispatch)?;
        proto::json::ResponsePayload::new(&response)
            .deserialize::<GetAWSDefaultServiceQuotaResponse, _>()
    }
<p>Retrieves the default value for the specified quota. The default value does not reflect any quota increases.</p>
rusoto/services/service-quotas/src/generated.rs