sqs

customResolver := aws.EndpointResolverWithOptionsFunc(func(service, region string, options ...interface{}) (aws.Endpoint, error) {
	if service == sqs.ServiceID && region == "eu-west-1" {
		return aws.Endpoint{
			URL:           "http://localhost:4576",
			SigningRegion: "eu-west-1",
		}, nil
	}
	// returning EndpointNotFoundError will allow the service to fallback to it's default resolution
	return aws.Endpoint{}, &aws.EndpointNotFoundError{}
})

cfg, err := config.LoadDefaultConfig(context.TODO(),
	config.WithRegion("eu-west-1"),
	config.WithEndpointResolverWithOptions(customResolver),
)
if err != nil {
	log.Fatal(err)
}

api := sqs.NewFromConfig(cfg)

pub, err := New(api)
if err != nil {
	log.Fatal(err)
}

msg := &sqs.SendMessageInput{
	MessageBody: aws.String("message body"),
	QueueUrl:    aws.String("http://localhost:4576/queue/foo-queue"),
}

msgID, err := pub.Publish(context.Background(), msg)
if err != nil {
	log.Fatal(err)
}

fmt.Println(msgID)