$ git push
remote: Support for password authentication was removed on August 13, 2021. Please use a personal access token instead.
remote: Please see https://github.blog/2020-12-15-token-authentication-requirements-for-git-operations/ for more information.
fatal: Authentication failed for 'xxxxx'
解决办法
1.将本地id_rsa.pub 拷贝到 github 的 SSH keys 中
打开github，点击右上角头像，弹出列表，点击“Settings”，点击左侧栏目上的“SSH and GPG keys”，再点击“New SSH Key”，将本地~/.ssh/id_rsa.pub中的内容复制进去。
2.修改本地git的remote url
在代码仓库复制ssh地址，然后在本地执行：
git remote set-url origin ssh地址