public static function lookup_member($id = null, $email = null)
 {
     $id = (int) $id;
     $email = trim($email);
     $sql = "SELECT `AutoID` , `useremail`, `userFirstname`, `userLastname` FROM `user_signup`";
     if ($id || $email || $author) {
         $sql .= " WHERE";
     } else {
         return null;
     }
     if ($id) {
         $sql .= " `AutoID` = '{$id}'";
         if ($email || $author) {
             $sql .= " &&";
         }
     }
     if ($email) {
         $sql .= " `useremail` = '{$email}'";
     }
     if ($res = DatabaseFactory::passinggreen_master_db()->query($sql)) {
         if ($res->num_rows == 1) {
             $member = $res->fetch_object();
             return new Member($member->AutoID);
         } else {
             return null;
         }
     }
     return null;
 }
 public static function findCryptKeyByUserID($id)
 {
     $id = (int) $id;
     $sql = "SELECT `UserID` FROM `keys`";
     if ($id) {
         $sql .= " WHERE";
     } else {
         return null;
     }
     if ($id) {
         $sql .= " `UserID` = '{$id}'";
     }
     if ($res = DatabaseFactory::passinggreen_master_db()->query($sql)) {
         if ($res->num_rows == 1) {
             $crypt_key = $res->fetch_object();
             return new self($crypt_key->UserID);
         } else {
             return null;
         }
     }
     return null;
 }
 protected function master_db()
 {
     return DatabaseFactory::passinggreen_master_db();
 }