无法从不同的机器推到Heroku

我将repo从Heroku中仪表板设置中提到的URL克隆到Windows机器上。提交更改后,尝试推送到Heroku失败。

=> git push heroku master

fatal: 'heroku' does not appear to be a git repository
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

我遵循了一些指示 from here ,现在我得到了

=> git push heroku master

The authenticity of host 'heroku.com (50.19.85.156)' can't be established.
RSA key fingerprint is SHA256:xxxxxxxxxxxxxxxxxxxxxx/o.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'heroku.com,xx.xx.xx.xx' (RSA) to the list of known hosts.
git@heroku.com: Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.