App\Ninja\Repositories\AccountRepository::registerNinjaUser PHP Method

    public function registerNinjaUser($user)
    {
        if ($user->email == TEST_USERNAME) {
            return false;
        }
        $url = (Utils::isNinjaDev() ? SITE_URL : NINJA_APP_URL) . '/signup/register';
        $data = '';
        $fields = ['first_name' => urlencode($user->first_name), 'last_name' => urlencode($user->last_name), 'email' => urlencode($user->email)];
        foreach ($fields as $key => $value) {
            $data .= $key . '=' . $value . '&';
        }
        rtrim($data, '&');
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_POST, count($fields));
        curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_exec($ch);
        curl_close($ch);
    }

 /**
  * Handle the event.
  *
  * @param  UserSignedUp $event
  *
  * @return void
  */
 public function handle(UserSignedUp $event)
 {
     $user = Auth::user();
     if (Utils::isNinjaProd()) {
         $this->userMailer->sendConfirmation($user);
     } elseif (Utils::isNinjaDev()) {
         // do nothing
     } else {
         $this->accountRepo->registerNinjaUser($user);
     }
     session([SESSION_COUNTER => -1]);
 }