diff --git a/Account/Account.php b/Account/Account.php
index 1c81af972..01cd4f65d 100644
--- a/Account/Account.php
+++ b/Account/Account.php
@@ -306,19 +306,19 @@ class Account implements ArrayableInterface, \JsonSerializable
      *
      * Checks if the account has a permission defined
      *
-     * @param int    $permission Permission to check
-     * @param int    $unit       Unit Unit to check (null if all are acceptable)
-     * @param string $app        App App to check  (null if all are acceptable)
-     * @param string $module     Module Module to check  (null if all are acceptable)
-     * @param int    $type       Type (e.g. customer) (null if all are acceptable)
-     * @param int    $element    (e.g. customer id) (null if all are acceptable)
-     * @param int    $component  (e.g. address) (null if all are acceptable)
+     * @param int         $permission Permission to check
+     * @param int|null    $unit       Unit Unit to check (null if all are acceptable)
+     * @param string|null $app        App App to check  (null if all are acceptable)
+     * @param string|null $module     Module Module to check  (null if all are acceptable)
+     * @param int|null    $type       Type (e.g. customer) (null if all are acceptable)
+     * @param int|null    $element    (e.g. customer id) (null if all are acceptable)
+     * @param int|null    $component  (e.g. address) (null if all are acceptable)
      *
      * @return bool Returns true if the account has the permission, false otherwise
      *
      * @since  1.0.0
      */
-    public function hasPermission(int $permission, int $unit = null, string $app = null, string $module = null, int $type = null, $element = null, $component = null) : bool
+    public function hasPermission(int $permission, ?int $unit = null, ?string $app = null, ?string $module = null, ?int $type = null, ?int $element = null, ?int $component = null) : bool
     {
         $app = $app !== null ? strtolower($app) : $app;
 
diff --git a/Account/Group.php b/Account/Group.php
index e92e89216..56a67d8e4 100644
--- a/Account/Group.php
+++ b/Account/Group.php
@@ -15,6 +15,7 @@ declare(strict_types=1);
 namespace phpOMS\Account;
 
 use phpOMS\Contract\ArrayableInterface;
+use phpOMS\Stdlib\Base\Exception\InvalidEnumValue;
 
 /**
  * Account group class.
@@ -54,7 +55,7 @@ class Group implements ArrayableInterface, \JsonSerializable
     /**
      * Account name.
      *
-     * @var int
+     * @var array
      * @since 1.0.0
      */
     protected $members = [];
diff --git a/Account/PermissionAbstract.php b/Account/PermissionAbstract.php
index 5a750b194..8caa71cd1 100644
--- a/Account/PermissionAbstract.php
+++ b/Account/PermissionAbstract.php
@@ -38,7 +38,7 @@ class PermissionAbstract
     /**
      * Unit id.
      *
-     * @var int
+     * @var int|null
      * @since 1.0.0
      */
     protected $unit = null;
@@ -46,7 +46,7 @@ class PermissionAbstract
     /**
      * App name.
      *
-     * @var string
+     * @var string|null
      * @since 1.0.0
      */
     protected $app = null;
@@ -54,7 +54,7 @@ class PermissionAbstract
     /**
      * Module id.
      *
-     * @var int
+     * @var int|null
      * @since 1.0.0
      */
     protected $module = null;
@@ -62,7 +62,7 @@ class PermissionAbstract
     /**
      * Providing module id.
      *
-     * @var int
+     * @var int|null
      * @since 1.0.0
      */
     protected $from = 0;
@@ -70,7 +70,7 @@ class PermissionAbstract
     /**
      * Type.
      *
-     * @var int
+     * @var int|null
      * @since 1.0.0
      */
     protected $type = null;
@@ -78,7 +78,7 @@ class PermissionAbstract
     /**
      * Element id.
      *
-     * @var int
+     * @var int|null
      * @since 1.0.0
      */
     protected $element = null;
@@ -86,7 +86,7 @@ class PermissionAbstract
     /**
      * Component id.
      *
-     * @var int
+     * @var int|null
      * @since 1.0.0
      */
     protected $component = null;
@@ -114,7 +114,7 @@ class PermissionAbstract
     /**
      * Get unit id.
      *
-     * @return int
+     * @return int|null
      *
      * @since  1.0.0
      */
@@ -126,7 +126,7 @@ class PermissionAbstract
     /**
      * Set unit id.
      *
-     * @param int $unit Unit
+     * @param int|null $unit Unit
      *
      * @return void
      *
@@ -140,7 +140,7 @@ class PermissionAbstract
     /**
      * Get app name.
      *
-     * @return string
+     * @return string|null
      *
      * @since  1.0.0
      */
@@ -166,7 +166,7 @@ class PermissionAbstract
     /**
      * Get module id.
      *
-     * @return int
+     * @return int|null
      *
      * @since  1.0.0
      */
@@ -192,7 +192,7 @@ class PermissionAbstract
     /**
      * Get providing module id.
      *
-     * @return int
+     * @return int|null
      *
      * @since  1.0.0
      */
@@ -218,7 +218,7 @@ class PermissionAbstract
     /**
      * Get type.
      *
-     * @return int
+     * @return int|null
      *
      * @since  1.0.0
      */
@@ -244,7 +244,7 @@ class PermissionAbstract
     /**
      * Get element id.
      *
-     * @return int
+     * @return int|null
      *
      * @since  1.0.0
      */
@@ -270,7 +270,7 @@ class PermissionAbstract
     /**
      * Get component id.
      *
-     * @return int
+     * @return int|null
      *
      * @since  1.0.0
      */
diff --git a/DataStorage/Cache/Connection/MemCached.php b/DataStorage/Cache/Connection/MemCached.php
index 403870bb9..b34bb5135 100644
--- a/DataStorage/Cache/Connection/MemCached.php
+++ b/DataStorage/Cache/Connection/MemCached.php
@@ -40,7 +40,6 @@ class MemCached extends ConnectionAbstract
      * @since 1.0.0
      */
     private $threshold = 10;
-    private $status;
 
     /**
      * Constructor.
@@ -52,6 +51,14 @@ class MemCached extends ConnectionAbstract
         $this->memc = null;
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function connect(array $data) /* : void */
+    {
+        $this->status = CacheStatus::ACTIVE;
+    }
+
     /**
      * Adding server to server pool.
      *
diff --git a/DataStorage/Cache/Connection/RedisCache.php b/DataStorage/Cache/Connection/RedisCache.php
index 75c119fdf..c69837876 100644
--- a/DataStorage/Cache/Connection/RedisCache.php
+++ b/DataStorage/Cache/Connection/RedisCache.php
@@ -27,6 +27,14 @@ namespace phpOMS\DataStorage\Cache\Connection;
 class RedisCache extends ConnectionAbstract
 {
 
+    /**
+     * {@inheritdoc}
+     */
+    public function connect(array $data) /* : void */
+    {
+        $this->status = CacheStatus::ACTIVE;
+    }
+    
     /**
      * {@inheritdoc}
      */
diff --git a/DataStorage/Cache/Connection/WinCache.php b/DataStorage/Cache/Connection/WinCache.php
index 776838507..ae080cc32 100644
--- a/DataStorage/Cache/Connection/WinCache.php
+++ b/DataStorage/Cache/Connection/WinCache.php
@@ -26,6 +26,13 @@ namespace phpOMS\DataStorage\Cache\Connection;
  */
 class WinCache extends ConnectionAbstract
 {
+    /**
+     * {@inheritdoc}
+     */
+    public function connect(array $data) /* : void */
+    {
+        $this->status = CacheStatus::ACTIVE;
+    }
 
     /**
      * {@inheritdoc}