You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: api_op_GetGroupId.go
    path of file: ./repos/aws-sdk-go-v2/service/identitystore
    
    the code of the file until where you have to start completion: // Code generated by smithy-go-codegen DO NOT EDIT.

package identitystore

import (
	"context"
	"fmt"
	awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
	"github.com/aws/aws-sdk-go-v2/service/identitystore/types"
	"github.com/aws/smithy-go/middleware"
	smithyhttp "github.com/aws/smithy-go/transport/http"
)

// Retrieves GroupId in an identity store. If you have administrator access to a
// member account, you can use this API from the member account. Read about member
// accounts (https://docs.aws.amazon.com/organizations/latest/userguide/orgs_manage_accounts_access.html)
// in the Organizations User Guide.
func (c *Client) GetGroupId(ctx context.Context, params *GetGroupIdInput, optFns ...func(*Options)) (*GetGroupIdOutput, error) {
	if params == nil {
		params = &GetGroupIdInput{}
	}

	result, metadata, err := c.invokeOperation(ctx, "GetGroupId", params, optFns, c.addOperationGetGroupIdMiddlewares)
	if err != nil {
		return nil, err
	}

	out := result.(*GetGroupIdOutput)
	out.ResultMetadata = metadata
	return out, nil
}

type GetGroupIdInput struct {

	// A unique identifier for a user or group that is not the primary identifier.
	// This value can be an identifier from an external identity provider (IdP) that is
	// associated with the user, the group, or a unique attribute. For the unique
	// attribute, the only valid path is displayName .
	//
	// This member is required.
	AlternateIdentifier types.AlternateIdentifier

	// The globally unique identifier for the identity store.
	//
	// This member is required.
	IdentityStoreId *string

	noSmithyDocumentSerde
}

type GetGroupIdOutput struct {

	// The identifier for a group in the identity store.
	//
	// Thi
    
func (c *Client) addOperationGetGroupIdMiddlewares(stack *middleware.Stack, options Options) (err error) {
	if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil {
		return err
	}
	err = stack.Serialize.Add(&awsAwsjson11_serializeOpGetGroupId{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsAwsjson11_deserializeOpGetGroupId{}, middleware.After)
	if err != nil {
		return err
	}
	if err := addProtocolFinalizerMiddlewares(stack, options, "GetGroupId"); err != nil {
		return fmt.Errorf("add protocol finalizers: %v", err)
	}

	if err = addlegacyEndpointContextSetter(stack, options); err != nil {
		return err
	}
	if err = addSetLoggerMiddleware(stack, options); err != nil {
		return err
	}
	if err = addClientRequestID(stack); err != nil {
		return err
	}
	if err = addComputeContentLength(stack); err != nil {
		return err
	}
	if err = addResolveEndpointMiddleware(stack, options); err != nil {
		return err
	}
	if err = addComputePayloadSHA256(stack); err != nil {
		return err
	}
	if err = addRetry(stack, options); err != nil {
		return err
	}
	if err = addRawResponseToMetadata(stack); err != nil {
		return err
	}
	if err = addRecordResponseTiming(stack); err != nil {
		return err
	}
	if err = addClientUserAgent(stack, options); err != nil {
		return err
	}
	if err = smithyhttp.AddErrorCloseResponseBodyMiddleware(stack); err != nil {
		return err
	}
	if err = smithyhttp.AddCloseResponseBodyMiddleware(stack); err != nil {
		return err
	}
	if err = addSetLegacyContextSigningOptionsMiddleware(stack); err != nil {
		return err
	}
	if err = addOpGetGroupIdValidationMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opGetGroupId(options.Region), middleware.Before); err != nil {
		return err
	}
	if err = addRecursionDetection(stack); err != nil {
		return err
	}
	if err = addRequestIDRetrieverMiddleware(stack); err != nil {
		return err
	}
	if err = addResponseErrorMiddleware(stack); err != nil {
		return err
	}
	if err = addRequestResponseLogging(stack, options); err != nil {
		return err
	}
	if err = addDisableHTTPSMiddleware(stack, options); err != nil {
		return err
	}
	return nil
}