场景：

You won't be able to pull or push project code via SSH until you add an SSH key to your profile
在向你的配置文件中添加SSH密匙之前，你将无法通过SSH拉取获取或者推送代码。

创建一个SSH Key：

lanfeiy@yelanfei MINGW64 /
$ ssh-keygen -t rsa -C "邮件地址"
Generating public/private rsa key pair.
Enter file in which to save the key (/c/Users/lanfeiy/.ssh/id_rsa):
Created directory '/c/Users/lanfeiy/.ssh'.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /c/Users/lanfeiy/.ssh/id_rsa
Your public key has been saved in /c/Users/lanfeiy/.ssh/id_rsa.pub
The key fingerprint is:
SHA256:IDPd3oMh4UD/PRIEwgH9D2NPXRQ4aBWxZhPadoXL8Gs XXXXXXXXXXXXXXXXXXXXXX
The key's randomart image is:
+---[RSA 3072]----+
|  .==.o..o==oo.  |
|    o* +oo+oo.   |
|    +.*.=.B*..   |
|     +==.X.o+    |
|     . *S =  .   |
|        o. oE    |
|           .     |
|                 |
|                 |
+----[SHA256]-----+

在目录C:\Users\lanfeiy.ssh下打开id_rsa.pub文件，将里面的内容添加到GitLab，如下图：

GIT | git添加ssh key_linux