remove personal cache only on user login/logout

src/application/controller/login.php

@@ -80,7 +80,8 @@ if (isset($_POST) && $_POST) {
         $_SESSION['userName'] = $userName;
         $_SESSION['userId']   = $userId;
 
-        $_memcache->flush();
+        $_memcache->delete('api.user.profile.' . $userName);
+        $_memcache->delete('api.user.avatar.' . $userName);
 
         // Redirect
         header('Location: ' . PROJECT_HOST, true, 302);

src/application/controller/logout.php

@@ -3,9 +3,10 @@
 
 if (isset($_SESSION['userName'])) {
 
-    session_destroy();
+    $_memcache->delete('api.user.profile.' . $_SESSION['userName']);
+    $_memcache->delete('api.user.avatar.' . $_SESSION['userName']);
 
-    $_memcache->flush();
+    session_destroy();
 }
 
 header('Location: ' . PROJECT_HOST, true, 302);