diff --git a/backend/classes/controller/FingerprintPutController.php b/backend/classes/controller/FingerprintPutController.php
index a2123e9..967f3f6 100644
--- a/backend/classes/controller/FingerprintPutController.php
+++ b/backend/classes/controller/FingerprintPutController.php
@@ -5,6 +5,9 @@ declare(strict_types=1);
 final class FingerprintPutController extends AbstractController
 {
 	protected string $route = '/api/v1/fingerprint/{fingerprintId}';
+	protected array $mandatoryAttributes = [
+		'fingerprint',
+	];
 
 	private int $fingerprintId;
 
diff --git a/backend/classes/controller/UserGetController.php b/backend/classes/controller/UserGetController.php
index 2ecf056..5364c4e 100644
--- a/backend/classes/controller/UserGetController.php
+++ b/backend/classes/controller/UserGetController.php
@@ -17,9 +17,15 @@ final class UserGetController extends AbstractController
 
     public function handle(): void
     {
-        $user = new User($this->userId);
+		$this->response = new ApiJsonResponse();
 
-        $this->response = new ApiJsonResponse();
-        $this->response->setResult($user);
+		try {
+			$user = new User($this->userId);
+			$this->response->setResult($user);
+		} catch (Throwable $e) {
+			$this->response->setParameter('success', false);
+			$this->response->setStatus($e->getCode() !== 0 ? $e->getCode() : ServerStatus::INTERNAL_ERROR);
+			$this->response->setMessage($e->getMessage());
+		}
     }
 }
\ No newline at end of file