diff --git a/nur_src/b/authnz/InvalidUser.php b/nur_src/b/authnz/InvalidUser.php
index e7ff359..727ad13 100644
--- a/nur_src/b/authnz/InvalidUser.php
+++ b/nur_src/b/authnz/InvalidUser.php
@@ -1,9 +1,14 @@
 <?php
 namespace nur\b\authnz;
 
+use ArrayAccess;
 use nur\A;
+use nur\b\coll\TBaseArray;
+use nur\b\coll\TGenericArray;
+
+class InvalidUser implements IAuthzUser, ArrayAccess {
+  use TBaseArray, TGenericArray;
 
-class InvalidUser implements IAuthzUser {
   /** @var self */
   private static $instance;
 
@@ -15,6 +20,7 @@ class InvalidUser implements IAuthzUser {
 
   function __construct(?string $username=null) {
     $this->username = $username;
+    $this->data = [];
   }
 
   function isValid(): bool {
@@ -59,8 +65,4 @@ class InvalidUser implements IAuthzUser {
   function has($key): bool {
     return false;
   }
-
-  function get($key, $default=null) {
-    return $default;
-  }
 }
diff --git a/src/db/Capacitor.php b/src/db/Capacitor.php
index 80e132b..dfd3f1b 100644
--- a/src/db/Capacitor.php
+++ b/src/db/Capacitor.php
@@ -42,8 +42,8 @@ class Capacitor {
     $this->storage->_ensureExists($this->channel);
   }
 
-  function reset(): void {
-    $this->storage->_reset($this->channel);
+  function reset(bool $ensureExists=false): void {
+    $this->storage->_reset($this->channel, $ensureExists);
   }
 
   function charge($item, $func=null, ?array $args=null): int {
diff --git a/src/db/CapacitorStorage.php b/src/db/CapacitorStorage.php
index dc6d562..cfd0dae 100644
--- a/src/db/CapacitorStorage.php
+++ b/src/db/CapacitorStorage.php
@@ -127,11 +127,11 @@ abstract class CapacitorStorage {
     $this->_ensureExists($this->getChannel($channel));
   }
 
-  abstract function _reset(CapacitorChannel $channel): void;
+  abstract function _reset(CapacitorChannel $channel, bool $ensureExists=false): void;
 
   /** supprimer le canal spécifié */
-  function reset(?string $channel): void {
-    $this->_reset($this->getChannel($channel));
+  function reset(?string $channel, bool $ensureExists=false): void {
+    $this->_reset($this->getChannel($channel), $ensureExists);
   }
 
   function _charge(CapacitorChannel $channel, $item, $func, ?array $args): int {
diff --git a/src/db/mysql/MysqlStorage.php b/src/db/mysql/MysqlStorage.php
index d6085cf..b8cb20f 100644
--- a/src/db/mysql/MysqlStorage.php
+++ b/src/db/mysql/MysqlStorage.php
@@ -54,12 +54,13 @@ class MysqlStorage extends CapacitorStorage {
     $this->_create($channel);
   }
 
-  function _reset(CapacitorChannel $channel): void {
+  function _reset(CapacitorChannel $channel, bool $ensureExists=false): void {
     $this->db->exec([
       "drop table if exists",
       $channel->getTableName(),
     ]);
     $channel->setCreated(false);
+    if ($ensureExists) $this->_ensureExists($channel);
   }
 
   function close(): void {
diff --git a/src/db/sqlite/SqliteStorage.php b/src/db/sqlite/SqliteStorage.php
index 764325f..7e3633f 100644
--- a/src/db/sqlite/SqliteStorage.php
+++ b/src/db/sqlite/SqliteStorage.php
@@ -52,12 +52,13 @@ class SqliteStorage extends CapacitorStorage {
     $this->_create($channel);
   }
 
-  function _reset(CapacitorChannel $channel): void {
+  function _reset(CapacitorChannel $channel, bool $ensureExists=false): void {
     $this->db->exec([
       "drop table if exists",
       $channel->getTableName(),
     ]);
     $channel->setCreated(false);
+    if ($ensureExists) $this->_ensureExists($channel);
   }
 
   function close(): void {