prevent having null mlcAllowanceAmount in applyHouseholdAllowance

src/Admin/AdherentAdmin.php

@@ -708,6 +708,7 @@ class AdherentAdmin extends AbstractAdmin
     {
         $em = $this->getConfigurationPool()->getContainer()->get('doctrine')->getManager();
 
+        // @TODO: Received UndefinedMethodError: "Attempted to call an undefined method named "getUser" of class "App\Entity\User".
         if (empty($adherent->getUser()->getUsername())) {
             $adherent->getUser()->setUsername($adherent->getUser()->getEmail());
         }

src/Utils/TAVCotisationUtils.php

@@ -314,6 +314,8 @@ class TAVCotisationUtils
         $householdCount = $adherent->getHouseholdCount();
 
         if (is_null($householdCount) || $householdCount == 0) {
+            // if required param is missing, set allocation to a default value of 100 to avoid process interuption
+            $adherent->setAllocationAmount(100);
             return;
         }