检查您的git config credential.helper配置：如果返回manager，则意味着凭证（用户名/密码）已缓存。
键入git credential-manager reject https://github.com，如explained here。
下次推送将再次要求您输入用户名/密码。

MacOS -使用gh CLI

安装gh CLI

brew install gh

对于MacOS，您不需要运行git config，因为GCM会自动为您配置Git。
当您需要切换您登录的帐户时

gh auth login

它将询问类似下面内容

? What account do you want to log into? GitHub Enterprise Server
? GHE hostname: github.com
? You're already logged into github.com. Do you want to re-authenticate? Yes
? What is your preferred protocol for Git operations? HTTPS
? Authenticate Git with your GitHub credentials? Yes
? How would you like to authenticate GitHub CLI? Login with a web browser

! First copy your one-time code: XXXX-XXXX
Press Enter to open github.com in your browser...
✓ Authentication complete.
- gh config set -h github.com git_protocol https
✓ Configured git protocol
✓ Logged in as xxxx_xxxx

然后你克隆/或做任何其他git操作如下

gh repo clone project/repo

参考：https://docs.github.com/en/get-started/getting-started-with-git/caching-your-github-credentials-in-git