do not add new user to group 0

src/Auth/Business/LuticateUsersBusiness.php

         $user->setLastname($lastname);
         $user->setSalt(self::getSalt());
 
-        DB::beginTransaction();
-
-        $user_id = LuticateUsersDataAccess::addId($user);
-
-        if (!is_null(LuticateGroupsBusiness::getById(0))) {
-            LuticateGroupsBusiness::addUser($user_id, 0);
-        }
-        DB::commit();
-
-        return $user_id;
+        return LuticateUsersDataAccess::addId($user);
     }
 
     public static function edit($user_id, $firstname, $lastname, $email)