async execute(event: ImportFilesEvent): Promise<void> {
    const ftpConfig = await this.readFtpConfiguration();
    this.ftp.configure(ftpConfig);
    await this.ftp.connect();
    const files = await this.ftp.list(event.ftp_path);
    for (const ftpFile of files) {
        const fileStream = await this.ftp.get(`${event.ftp_path}/${ftpFile.name}`);
        await this.s3.put(fileStream, ftpFile.name, event.s3_bucket);
        await this.ftp.delete(`${event.ftp_path}/${ftpFile.name}`);
    }
    this.ftp.disconnect();
}