async fn describe_stack_provisioning_parameters(
        &self,
        input: DescribeStackProvisioningParametersRequest,
    ) -> Result<
        DescribeStackProvisioningParametersResult,
        RusotoError<DescribeStackProvisioningParametersError>,
    > {
        let mut request = self.new_signed_request("POST", "/");
        request.add_header(
            "x-amz-target",
            "OpsWorks_20130218.DescribeStackProvisioningParameters",
        );
        let encoded = serde_json::to_string(&input).unwrap();
        request.set_payload(Some(encoded));

        let response = self
            .sign_and_dispatch(
                request,
                DescribeStackProvisioningParametersError::from_response,
            )
            .await?;
        let mut response = response;
        let response = response.buffer().await.map_err(RusotoError::HttpDispatch)?;
        proto::json::ResponsePayload::new(&response)
            .deserialize::<DescribeStackProvisioningParametersResult, _>()
    }
<p>Requests a description of a stack's provisioning parameters.</p> <p> <b>Required Permissions</b>: To use this action, an IAM user must have a Show, Deploy, or Manage permissions level for the stack or an attached policy that explicitly grants permissions. For more information about user permissions, see <a href="https://docs.aws.amazon.com/opsworks/latest/userguide/opsworks-security-users.html">Managing User Permissions</a>.</p>
rusoto/services/opsworks/src/generated.rs