activate = () => {
    AWSMock.mock('S3', 'getObject', this.getObject)
    AWSMock.mock('S3', 'listObjectsV2', this.listObjectsV2)
    AWSMock.mock('S3', 'putObject', this.putObject)
    AWSMock.mock('S3', 'deleteObject', this.deleteObject)