You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: api_op_DescribeAccountAttributes.go
    path of file: ./repos/aws-sdk-go-v2/service/pinpointsmsvoicev2
    
    the code of the file until where you have to start completion: // Code generated by smithy-go-codegen DO NOT EDIT.

package pinpointsmsvoicev2

import (
	"context"
	"fmt"
	awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
	"github.com/aws/aws-sdk-go-v2/service/pinpointsmsvoicev2/types"
	"github.com/aws/smithy-go/middleware"
	smithyhttp "github.com/aws/smithy-go/transport/http"
)

// Describes attributes of your Amazon Web Services account. The supported account
// attributes include account tier, which indicates whether your account is in the
// sandbox or production environment. When you're ready to move your account out of
// the sandbox, create an Amazon Web Services Support case for a service limit
// increase request. New Amazon Pinpoint accounts are placed into an SMS or voice
// sandbox. The sandbox protects both Amazon Web Services end recipients and SMS or
// voice recipients from fraud and abuse.
func (c *Client) DescribeAccountAttributes(ctx context.Context, params *DescribeAccountAttributesInput, optFns ...func(*Options)) (*DescribeAccountAttributesOutput, error) {
	if params == nil {
		params = &DescribeAccountAttributesInput{}
	}

	result, metadata, err := c.invokeOperation(ctx, "DescribeAccountAttributes", params, optFns, c.addOperationDescribeAccountAttributesMiddlewares)
	if err != nil {
		return nil, err
	}

	out := result.(*DescribeAccountAttributesOutput)
	out.ResultMetadata = metadata
	return out, nil
}

type DescribeAccountAttributesInput struct {

	// The maximum number of results to return per each request.
	MaxResults *int32

	// The token to be used for the next set of paginated results. You don't need to
	// supply a value for this field in the initial request.
	NextToken *str
    
func (c *Client) addOperationDescribeAccountAttributesMiddlewares(stack *middleware.Stack, options Options) (err error) {
	if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil {
		return err
	}
	err = stack.Serialize.Add(&awsAwsjson10_serializeOpDescribeAccountAttributes{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsAwsjson10_deserializeOpDescribeAccountAttributes{}, middleware.After)
	if err != nil {
		return err
	}
	if err := addProtocolFinalizerMiddlewares(stack, options, "DescribeAccountAttributes"); err != nil {
		return fmt.Errorf("add protocol finalizers: %v", err)
	}

	if err = addlegacyEndpointContextSetter(stack, options); err != nil {
		return err
	}
	if err = addSetLoggerMiddleware(stack, options); err != nil {
		return err
	}
	if err = addClientRequestID(stack); err != nil {
		return err
	}
	if err = addComputeContentLength(stack); err != nil {
		return err
	}
	if err = addResolveEndpointMiddleware(stack, options); err != nil {
		return err
	}
	if err = addComputePayloadSHA256(stack); err != nil {
		return err
	}
	if err = addRetry(stack, options); err != nil {
		return err
	}
	if err = addRawResponseToMetadata(stack); err != nil {
		return err
	}
	if err = addRecordResponseTiming(stack); err != nil {
		return err
	}
	if err = addClientUserAgent(stack, options); err != nil {
		return err
	}
	if err = smithyhttp.AddErrorCloseResponseBodyMiddleware(stack); err != nil {
		return err
	}
	if err = smithyhttp.AddCloseResponseBodyMiddleware(stack); err != nil {
		return err
	}
	if err = addSetLegacyContextSigningOptionsMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opDescribeAccountAttributes(options.Region), middleware.Before); err != nil {
		return err
	}
	if err = addRecursionDetection(stack); err != nil {
		return err
	}
	if err = addRequestIDRetrieverMiddleware(stack); err != nil {
		return err
	}
	if err = addResponseErrorMiddleware(stack); err != nil {
		return err
	}
	if err = addRequestResponseLogging(stack, options); err != nil {
		return err
	}
	if err = addDisableHTTPSMiddleware(stack, options); err != nil {
		return err
	}
	return nil
}