Repair bugs with global parameter

app/views/Logout.php

@@ -3,7 +3,7 @@ class Logout extends Template
 {
 	function __construct()
 	{
-		global $userManager;
+		$userManager = new UserManager ();
 		$userManager->logout();
 		header('Location: ' . BASEURL . 'login');
 		die();

app/views/Oauth.php

@@ -3,7 +3,7 @@ class Oauth extends Template
 {
 	function __construct()
 	{
-		global $userManager;
+		$userManager = new UserManager ();
 		$langMng = new LanguageManager('en');
 
 		$template = new Template('oauth');