Debugging SSH shows success!!

This tutorial shows that I have successfully configure SSH. As I see the following output after this command ssh -vT git@github.com.

Error: Permission denied (publickey) This terribly nondescript error simply means that the server rejected your connection. There are a number of reasons this can happen, this guide will cover the most common causes.

Here is the output:

...
debug1: Connecting to github.com [207.97.227.239] port 22.
debug1: Connection established.
debug1: identity file /home/huahsin68/.ssh/id_rsa type 1
...
...
Hi huahsin68! You've successfully authenticated, but GitHub does not provide shell access.
...