identitystore apis failing with url error

[JishantSingh]

Describe the bug

identitystore.DescribeUser and identitystore.ListUsers fail with wrong url.
https://identitystore..amazonaws.com/

Tried running on macos sonoma 14.2.1 and in k8s container with golang:1.20.4 base image.

Probably true for other idc apis too, however I have only verified for these two.

Expected Behavior

Should use a valid url.

Current Behavior

Error in describe user, operation error identitystore: ListUsers, https response error StatusCode: 0, RequestID: , request send failed, Post https://identitystore..amazonaws.com/: dial tcp: lookup identitystore..amazonaws.com: no such host

Reproduction Steps

Use the following script

import (
	"context"
	"fmt"
	"github.com/aws/aws-sdk-go-v2/credentials"
	"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/identitystore"
)

func main() {
	cfg, err := config.LoadDefaultConfig(context.TODO(),
		config.WithCredentialsProvider(credentials.NewStaticCredentialsProvider(
			"access_key",
			"secret_key",
			"token",
		)))
	if err != nil {
		log.Fatalf("unable to load SDK config, %v", err)
	}

	svc := identitystore.NewFromConfig(cfg)

	resp, err := svc.DescribeUser(context.TODO(), &identitystore.DescribeUserInput{
		IdentityStoreId: aws.String("idc_id"),
		UserId:          aws.String("idc_user_id"),
	})

	if err != nil {
		log.Fatalf("Error in describe user, %v", err)
	}
	fmt.Println("-----RECV------")
	fmt.Println(*resp)
}

Possible Solution

No response

Additional Information/Context

No response

SDK version used

1.24.1

Environment details (Version of Go (go version)? OS name and version, etc.)

Go 1.20.4, MacOS Sonoma 14.2.1,

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[JishantSingh]

Had to pass region as a mandatory option.