首先必须明白:
一个gitlab账号对应一个私钥和密钥。
一、新建user1的SSH key
ssh-keygen -t rsa -C "user1@email.com"
Enter file in which to save the key (/Users/Administrator/.ssh/id_rsa):
/c/Users/Administrator/.ssh/id_rsa_user1
将.ssh/id_rsa_user1.pub文件打开,复制里面的公钥,到gitlab/github的ssh中