如果使用私有存储库检查连接用户，则该用户必须具有使用存储库的权限。

Normally it happens because the project is private and you have not rights to write it. I had the same "problem" a few times, and it was for that reason. If the project it is yours, just create a private and a public key following this link: https://docs.github.com/en/github/authenticating-to-github/generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent and add them to the "SSH and Key" section on gitHub, then you will be able to push to the repo. In the other hand if the project it is not your, ask the owner to give you the rights for it.

转到你的项目文件夹，然后搜索。git文件夹，然后用记事本打开配置文件，检查是否有你的链接到github回购下:[remote "origin"]，如果它是不同的，然后在你的github回购，然后编辑它，或在配置文件中打开一个新的回购名称

这也可能发生，因为GitHub本身宕机了。一定要检查stat.github.com，看看问题是否在他们那边。

2018年10月22日，你有好几个小时都无法推送到GitHub。

我通过Github重新认证解决了这个问题。

如果你有Github CLI，你可以输入gh auth登录

我也遇到过类似的问题。错误的凭据缓存在OS X的密钥链中。

查看:https://help.github.com/articles/updating-credentials-from-the-osx-keychain