const import_csv = id => {
    this.id = id;

    this.file = function (filePath, separator = ';', encoding = 'win1252') {
        this.filePath  = filePath;
        this.separator = separator;
        this.encoding  = encoding;

        this.stream = fs.createReadStream(filePath)
        .pipe(iconv.decodeStream(encoding))
        .pipe(parser({ separator: separator }));

        return this;
    };