add groups on household serialization

src/Bundle/ChillPersonBundle/Entity/Household/Household.php

@@ -26,7 +26,7 @@ class Household
      * @ORM\Column(type="integer")
      * @Serializer\Groups({"read"})
      */
-    private ?int $id;
+    private ?int $id = null;
 
     /**
      * Addresses
@@ -44,6 +44,7 @@ class Household
      *      targetEntity=HouseholdMember::class,
      *      mappedBy="household"
      *  )
+     * @Serializer\Groups({"read"})
      */
     private Collection $members;