将代码推送到github时权限被拒绝（publickey）错误

Question

我试图将django项目代码推送至github，我尝试推送https url时，我使用了所有命令；当我尝试使用SSH url时，它表示错误为

git@github.com: Permission denied (publickey).
fatal: Could not read from remote repository.

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