public function doesUserExist() { try { $params = $this->getParams(); $username = $params[0]; $userModel = new UsersModel(); $userExist = $userModel->userExist($username); $userExist = $userExist[0]['COUNT(username)']; $response = new AJAXAnswer(); if (!$userExist) { $response->setSuccess(true); } else { $response->setSuccess(false); } $response->answer(); } catch (\Exception $e) { $error = new AJAXAnswer(false, $e->getMessage()); $error->answer(); } }