/**
  * Log a password change from the given member.
  * Call MemberPassword::log($this) from within Member whenever the password is changed.
  *
  * @param Member $member
  */
 public static function log($member)
 {
     $record = new MemberPassword();
     $record->MemberID = $member->ID;
     $record->Password = $member->Password;
     $record->PasswordEncryption = $member->PasswordEncryption;
     $record->Salt = $member->Salt;
     $record->write();
 }