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Showing content from https://docs.aws.amazon.com/sdk-for-go/v2/developer-guide/getting-started.html below:

Get started with AWS SDK for Go

The AWS SDK for Go requires Go 1.20 or later. You can view your current version of Go by running the following command:

go version

For information about installing or upgrading your version of Go, see https://golang.org/doc/install.

Before you can use the AWS SDK for Go v2, you must have an Amazon account. See How do I create and activate a new AWS account? for details.

The AWS SDK for Go v2 uses Go modules, which was a feature introduced in Go 1.11. Initialize your local project by running the following Go command.

go mod init example

After initializing your Go module project, you will be able to retrieve the SDK and its required dependencies using the go get command. These dependencies will be recorded in the go.mod file which was created by the previous command.

The following commands show how to retrieve the standard set of SDK modules to use in your application.

go get github.com/aws/aws-sdk-go-v2
go get github.com/aws/aws-sdk-go-v2/config

This will retrieve the core SDK module, and the config module which is used for loading the AWS shared configuration.

Next you can install one or more AWS service API clients required by your application. All API clients are located under github.com/aws/aws-sdk-go-v2/service import hierarchy. A complete set of currently supported API clients can be found here. To install a service client, execute the following command to retrieve the module and record the dependency in your go.mod file. In this example we retrieve the Amazon S3 API client.

go get github.com/aws/aws-sdk-go-v2/service/s3

Access keys consist of an access key ID and secret access key, which are used to sign programmatic requests that you make to AWS. If you don’t have access keys, you can create them by using the AWS Management Console. We recommend that you use IAM access keys instead of AWS root account access keys. IAM lets you securely control access to AWS services and resources in your AWS account.

1. Open the IAM console

2. On the navigation menu, choose Users.

3. Choose your IAM user name (not the check box).

4. Open the Security credentials tab, and then choose Create access key.

5. To see the new access key, choose Show. Your credentials resemble the following:

   • Access key ID: AKIAIOSFODNN7EXAMPLE

   • Secret access key: wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY

6. To download the key pair, choose Download .csv file. Store the keys in a secure location.

Keep the keys confidential to protect your AWS account, and never share them with anyone outside your organization.

After you have installed the SDK, you import AWS packages into your Go applications to use the SDK, as shown in the following example, which imports the AWS, Config, and Amazon S3 libraries. After importing the SDK packages, the AWS SDK Shared Configuration is loaded, a client is constructed, and an API operation is invoked.

package main

import (
    "context"
    "log"
    "github.com/aws/aws-sdk-go-v2/aws"
    "github.com/aws/aws-sdk-go-v2/config"
    "github.com/aws/aws-sdk-go-v2/service/s3"
)

func main() {
    // Load the Shared AWS Configuration (~/.aws/config)
    cfg, err := config.LoadDefaultConfig(context.TODO())
    if err != nil {
        log.Fatal(err)
    }

    // Create an Amazon S3 service client
    client := s3.NewFromConfig(cfg)

    // Get the first page of results for ListObjectsV2 for a bucket
    output, err := client.ListObjectsV2(context.TODO(), &s3.ListObjectsV2Input{
        Bucket: aws.String("amzn-s3-demo-bucket"),
    })
    if err != nil {
        log.Fatal(err)
    }

    log.Println("first page results")
    for _, object := range output.Contents {
        log.Printf("key=%s size=%d", aws.ToString(object.Key), *object.Size)
    }
}

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