之前已经配置过gitlab，在创建新工程并提交代码时ssh报错。

• 错误详情

The authenticity of host 'gitlab.com (172.65.251.78)' can't be established.
ECDSA key fingerprint is SHA256:HbW3g8zUjNSksFbqTiUWPWg2Bq1x8xdGUrliXFzSnUw.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added 'gitlab.com,172.65.251.78' (ECDSA) to the list of known hosts.
git@gitlab.com: Permission denied (publickey).
fatal: Could not read from remote repository.

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

• 解决方案，重新生成新的ssh并进行认证
  • 在 “Git Bash” 中输入 ssh-keygen.
  • 此时会生成一个 .ssh文件夹.
  • 在该文件夹下跟根据 git账号生成公钥和私钥 id_rsa,id_rsa.pub
  • 打开 id_rsa.pub文件，复制里面的内容
  • 打开https://gitlab.com/profile/keys，验证自己的gitlab身份并添加key，粘贴刚才复制的 公钥.
  • 现在就可以向gitlab继续push代码了。