Handle exception in method call to check username

			return $response;

		}

		try {

			if (!$this->userService->userExists($username) && !$this->userService->isUsernameTaken($username)) {

				$response->setStatus(200);

				$this->session->set('username_check_passed', true);

			}

		} catch (Exception $e) {

			$this->logger->logException($e, ['app' => Application::APP_ID ]);

			$response->setStatus(500);

		}

		$this->session->set('username_check_passed', true);

		return $response;

	}