Explanation here: https://blog.owulveryck.info/2017/01/13/a-foot-in-nosql-and-a-toe-in-big-data/index.html

putpoducts.go

package main

import (
        "encoding/json"
        "github.com/aws/aws-sdk-go/aws"
        "github.com/aws/aws-sdk-go/aws/session"
        "github.com/aws/aws-sdk-go/service/dynamodb"
        "github.com/aws/aws-sdk-go/service/dynamodb/dynamodbattribute"
        "github.com/kelseyhightower/envconfig"
        "log"
        "net/http"
        "time"
)

// Configuration holds the environment variables for configuration
type Configuration struct {
        TableName  string `default:"products"`
        OfferIndex string `default:"https://pricing.us-east-1.amazonaws.com/offers/v1.0/aws/index.json"`
        BaseURL    string `default:"https://pricing.us-east-1.amazonaws.com"`
}

// offerIndex represents the structure as returned by the offerindex
type offerIndex struct {
        FormatVersion   string           `json:"formatVersion"`
        Disclaimer      string           `json:"disclaimer"`
        PublicationDate time.Time        `json:"publicationDate"`
        Offers          map[string]offer `json:"offers"`
}
type offer struct {
        OfferCode         string `json:"offerCode:"`
        VersionIndexURL   string `json:"versionIndexUrl"`
        CurrentVersionURL string `json:"currentVersionUrl"`
}

// ProductDetails represents a call to the API
type productDetails struct {
        Products map[string]struct { // the key is the product code
                //Sku           string                 `json:"sku"`
                ProductFamily string                 `json:"productFamily"`
                Attributes    map[string]interface{} `json:"attributes"`
        } `json:"products"`
}

func main() {
        // Create the session for dynamodb
        sess, err := session.NewSession()
        if err != nil {
                log.Fatal("failed to create session,", err)
        }

        svc := dynamodb.New(sess, &aws.Config{Region: aws.String("us-east-1")})

        var config Configuration
        err = envconfig.Process("AWSBILLING", &config)
        if err != nil {
                log.Fatal(err.Error())
        }
        // At first get the offer index and fill a structure
          resp, err := http.Get(config.OfferIndex)
        if err != nil {
                log.Fatal(err)
        }

        var oi offerIndex
        err = json.NewDecoder(resp.Body).Decode(&oi)
        if err != nil {
                log.Fatal(err)
        }
        resp.Body.Close()

        // Now, for each offer, get the offer details
        for _, o := range oi.Offers {
                resp, err := http.Get(config.BaseURL + o.CurrentVersionURL)
                if err != nil {
                        log.Fatal(err)
                }
                var pd productDetails
                err = json.NewDecoder(resp.Body).Decode(&pd)
                if err != nil {
                        log.Fatal(err)
                }
                resp.Body.Close()
                // Declare the Items we will upload in the DB
                var item = make(map[string]*dynamodb.AttributeValue, 3)
                for k, v := range pd.Products {
                        item["SKU"], err = dynamodbattribute.Marshal(k)
                        item["ProductFamily"], err = dynamodbattribute.Marshal(v.ProductFamily)
                        item["Attributes"], err = dynamodbattribute.Marshal(v.Attributes)
                        // Prepare the parameters for the Put operation
                        params := &dynamodb.PutItemInput{
                                Item:      item,
                                TableName: aws.String(config.TableName),
                        }
                        // Now put the item, discarding the result
                        _, err = svc.PutItem(params)

                        if err != nil {
                                // Print the error, cast err to awserr.Error to get the Code and
                                // Message from an error.
                                log.Fatal(err)
                        }
                }
        }
}