FIX #17671 TIME 0:05 add check if array group exist

src/app/user/controllers/UserController.php

@@ -245,7 +245,7 @@ class UserController
             return $response->withStatus(400)->withJson(['errors' => 'Body email is empty or not a valid email']);
         } elseif (!empty($body['x509Fingerprint']) && !Validator::stringType()->validate($body['x509Fingerprint'])) {
             return $response->withStatus(400)->withJson(['errors' => 'Body x509Fingerprint is not a string']);
-        } elseif (!Validator::arrayType()->each(Validator::intType())->validate($body['groups'])) {
+        } elseif (!empty($body['groups']) && !Validator::arrayType()->each(Validator::intType())->validate($body['groups'])) {
             return $response->withStatus(400)->withJson(['errors' => 'Body groups is not an array of integers']);
         }