Nesta Heroku App Git upload key

http://nestacms.com/docs/deployment/heroku
https://devcenter.heroku.com/articles/renaming-apps#manually_updating_a_git_remote

$ heroku create --stack bamboo-mri-1.9.2
Enter your Heroku credentials.
Email: ,(Herokuアカウント名)
Password (typing will be hidden):
Creating empty-robot-7262... done, stack is bamboo-mri-1.9.2
http://(新URL).heroku.com/ | git@heroku.com:(新URL).git
Git remote heroku added
! Notice: on Wed, 20 June, our default stack will change to Cedar. http://bit.ly/Lh0rM5
$ git push heroku master
The authenticity of host 'heroku.com (50.19.85.156)' can't be established.
RSA key fingerprint is 8b:48:5e:67:0e:c9:16:47:32:f2:87:0c:1f:c8:60:ad.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'heroku.com,50.19.85.156' (RSA) to the list of known hosts.
Permission denied (publickey).
fatal: The remote end hung up unexpectedly

~/.ssh$ ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (~/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in ~/.ssh/id_rsa.
Your public key has been saved in ~/.ssh/id_rsa.pub.

$ git push heroku master

Counting objects: 20, done.
---ゴニョゴニョ---
To git@heroku.com:(新URL).git
* [new branch] master -> master