public function send_cart() {
    $order_id = $_SESSION['order_id'];
    $send_order = $this->orders->send_order($order_id);
print_r($send_order); http_response_code(200); exit(); //// DEBUGGING LINE

    if(json_decode($send_order)->id) {
      http_response_code(200);
    }
    else {
      http_response_code(400);
    }