Int GetDistinctMedian (int [] A)

{

if (A == null) return 0;

return A.GetDistinctMedian ();

}
Here's what a token provider server would implement:

Class TokenProvider ()
        Def login(self, request):
                Token = OneTimeToken ()
                 Session.Add (token)
                 Return token
        Def logout (self, request, token):
                token= Token.lookup (request)
                If token:
                           Token.remove (token)
                            Session.remove (token)
        Def refresh_token (token):
                Return Token.refresh (token)
        Def validateToken (token):
                Return OTT.validateToken
OTT defined at https://github.com/ravibeta/pythonexamples/tokenprovider.py      
and https://github.com/ravibeta/PythonExamples/blob/master/tokenserver.py