Access servlet without login

I implemented a plugin.All is working but i want to use my servlet without login just like we can access PresentStatusServelt (Which is in presence plugin by “http://localhost:9090/plugins/presence/status”) without login.

my init() method code of servlet is:

** @Override**

** public void init(ServletConfig servletConfig) throws ServletException {**

** super.init(servletConfig);**

** // Exclude this servlet from requiring the user to login**

** AuthCheckFilter.addExclude(“myplugin/upload”);**

** }**

so why **AuthCheckFilter.addExclude(“myplugin/upload”); **this method is not working for me. When i directly hit my servlet without login.I always redirected for login page…Am I missing something…