enum ServerlessInstanceType {
            SERVERLESS = 'serverless',
        }
        type CustomInstanceType = ServerlessInstanceType | ec2.InstanceType;
        const CustomInstanceType = {
            ...ServerlessInstanceType,
            ...ec2.InstanceType,
        };

        this.serverlessCluster = new DatabaseCluster(
            this,
            'ServerlessClusterV2',
            {
                engine: DatabaseClusterEngine.auroraMysql({
                    version: AuroraMysqlEngineVersion.of(
                        '8.0.mysql_aurora.3.02.0'
                    ), // The new minor version of Database Engine.
                }),
                storageEncrypted: true,
                iamAuthentication: true,
                parameterGroup: ParameterGroup.fromParameterGroupName(
                    this,
                    'rdsClusterPrameterGroup',
                    'default.aurora-mysql8.0'
                ),
                storageEncryptionKey: new Key(this, 'dbEncryptionKey'),
                instanceProps: {
                    instanceType:
                        CustomInstanceType.SERVERLESS as unknown as InstanceType,
                    vpc: props.vpc,
                    vpcSubnets: {
                        subnetType: SubnetType.PRIVATE_ISOLATED,
                    },
                },
            }
        );