MAPG-142 modify UserConfirmationRepository to return only one confirmation for user

(it is not possible for an user to have multiple)

src/Controller/UserController.php

@@ -184,7 +184,8 @@ class UserController implements ISecured
 
         \Container::$dbConnection->startTransaction();
 
-        foreach ($this->userConfirmationRepository->getByUser($user) as $userConfirmation) {
+        $userConfirmation = $this->userConfirmationRepository->getByUser($user);
+        if ($userConfirmation !== null) {
             $this->pdm->deleteFromDb($userConfirmation);
         }