Generate random alphanumeric password

main.dart

import 'dart:math';

void main() async {
  var pwd = await getRandomPwd(8);
  print(pwd);
}

Future<String> getRandomPwd(int length) async {
  if (length > 62) {
    throw Error('The max length of the password could be 62');
  }
  const _chars = 'AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz1234567890';
  Random _rnd = Random();
  return String.fromCharCodes(
    Iterable.generate(
      length,
      (_) => _chars.codeUnitAt(_rnd.nextInt(_chars.length))
    )
  );
}