Add custom header to S3 CreateBucket request

Sample code for adding custom header to CreateBucket request.
AWS-SDK's CreateBucket does not let you add custom headers so you have to create your own http request.

import (
    "fmt"
    "log"
    "net/http"
    "time"

    "github.com/aws/aws-sdk-go/aws/credentials"
    v4 "github.com/aws/aws-sdk-go/aws/signer/v4"
)

func createBucket() {

    endpoint := "https://xxx.xxx.xxx/"
    region := "region-1"
    bucketName := "bucket-name"

    // Specify accesskey secretkey or read from env with NewEnvCredentials()

    cred := credentials.NewEnvCredentials()

    // cred := credentials.NewStaticCredentialsFromCreds(credentials.Value{
    //  AccessKeyID:     akey,
    //  SecretAccessKey: skey,
    // })

    signer := v4.NewSigner(cred)

    httpClient := &http.Client{}

    // Create a PUT request

    req, err := http.NewRequest(http.MethodPut, endpoint+bucketName, nil)
    if err != nil {
        fmt.Print(err)
    }

    // Now add whatever header you want

    req.Header.Add("Content-Type", "application/json")
    req.Header.Add("HEADER-TO-BE-ADDED", "HEADER-TO-BE-ADDED")

    // Sign it

    signer.Sign(req, nil, "s3", region, time.Now())

    // Send the request
    res, err := httpClient.Do(req)
    log.Println(res.Status)

}```