/**
  * @param \ArchangelDB\ADB2 $db
  * @param $table
  * @param $key
  * @throws \Exception
  * @return string
  */
 public static function generateUniqueToken(\ArchangelDB\ADB2 $db, $table, $key)
 {
     $token = self::generateToken();
     $check = $db->fetchOne($table, [$key => $token], $key);
     $attempts = 0;
     while (!empty($check)) {
         $attempts++;
         $token = self::generateToken();
         $check = $db->fetchOne($table, [$key => $token], $key);
         if ($attempts > 10) {
             throw new \Exception("Unique token generation error. Too many attempts.");
         }
     }
     return $token;
 }
 public function fetchOrders()
 {
     $orders = $this->_db->fetchAll('orders');
 }