■ Error details Create an app with cloud9. When you execute git push heroku maste, the following will be displayed.

Your account email address does not have access to app name.
fatal: unable to access'https://git.heroku.com/ app name.git /': The requested URL returned error: 403
I'm looking for a solution, but I didn't understand and asked a question.

● What I tried ① .git/config Result .git/config: Permission denied
● What I tried ② ・ Git remote add heroku https://git.heroku.com/application name.git ・ Git push heroku master Result .git/config: Permission denied

■ Supplement
・ I think you can log in to Heroku.
-I pushed it to the Heroku server with the following command.
$git init
$git add.
$git commit -m "initial commit"
$git push heroku master

I am sorry that I am unfamiliar and do not understand well, but I would appreciate it if you could teach me.