diff --git a/system/Controllers/SettingsController.php b/system/Controllers/SettingsController.php
index 7352d77..dfdbe75 100644
--- a/system/Controllers/SettingsController.php
+++ b/system/Controllers/SettingsController.php
@@ -615,7 +615,7 @@ class SettingsController extends Controller
 
 		# set navigation active
 		$navigation['Users']['active'] = true;
-			
+		
 		return $this->render($response, 'settings/user.twig', array(
 			'settings' 		=> $settings,
 			'acl' 			=> $this->c->acl, 
@@ -624,7 +624,7 @@ class SettingsController extends Controller
 			'userform' 		=> $userform, 			// field model, needed to generate frontend-field
 			'userdata' 		=> $userdata, 			// needed to fill form with data
 			'route' 		=> $route->getName()  	// needed to set link active
-		));		
+		));
 	}
 
 	public function listUser($request, $response)
diff --git a/system/Models/Validation.php b/system/Models/Validation.php
index 33c51ab..712c6db 100644
--- a/system/Models/Validation.php
+++ b/system/Models/Validation.php
@@ -58,8 +58,9 @@ class Validation
 		# checks if username is free when create new user
 		Validator::addRule('userAvailable', function($field, $value, array $params, array $fields) use ($user)
 		{
-			$userdata = $user->getUser($value);
-			if($userdata){ return false; }
+			$activeUser 	= $user->getUser($value);
+			$inactiveUser 	= $user->getUser("_" . $value);
+			if($activeUser OR $inactiveUser){ return false; }
 			return true;
 		}, 'taken');
 
diff --git a/system/author/settings/user.twig b/system/author/settings/user.twig
index dc9efa1..bfbce1d 100644
--- a/system/author/settings/user.twig
+++ b/system/author/settings/user.twig
@@ -34,6 +34,15 @@
 								
 						{% endfor %}
 
+						{% if is_role('administrator') %}
+							<fieldset>
+								<div class="large">
+									<legend>Raw Userdata (readonly for admins)</legend>
+									<textarea readonly="readonly" rows="10">{{ userdata|json_encode(constant('JSON_PRETTY_PRINT')) }}</textarea>
+								</div>
+							</fieldset>
+						{% endif %}
+
 				</fieldset>
 
 			</section>