git连接github和gitlab的疑问

按照https://www.jianshu.com/p/68578d52470c配置后进行连接操作时
github可以正常使用@host名称连接
gitlab只能通过@gitlab连接

$ ssh -T [email protected]
The authenticity of host 'github.com (140.82.114.3)' can't be established.
RSA key fingerprint is SHA256:nThbg6kXUpJWGl7E1IGOCspRomTxdCARLviKw6E5SY8.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added 'github.com,140.82.114.3' (RSA) to the list of known hosts.
Hi lahhass! You've successfully authenticated, but GitHub does not provide shell access.

$ ssh -T [email protected]
The authenticity of host 'gitlab.com (xxx.xx.xxx.xx)' 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,xxx.xx.xxx.xx' (ECDSA) to the list of known hosts.
[email protected]: Permission denied (publickey).

$ ssh -T git@gitlab
Welcome to GitLab, @x!