toString method
Crypt format string.
For example, returns a string like:
$5$saltstring$5B8vYYiY.CVt1RlTTf8KbXBH3hsxY/GNooZaBBGWEc5
Note: some systems might expect the crypt format string to be represented slightly differently. For example, when used as the LDAP userPassword attribute, it needs to be prepended with "{crypt}".
Implementation
@override
String toString() {
final r = (_rounds != null) ? 'rounds=$_rounds\$' : '';
return '\$$_type\$$r$_salt\$$_hash';
}