generateId function
Implementation
String generateId({int length = 6}) {
String referralCode = '';
String pattern = 'AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz0123456789';
final random = Random();
for (int i = 1; i <= length; i++) {
referralCode += pattern[random.nextInt(pattern.length)];
}
return referralCode;
}