hexo 博客同时部署到 github 和 gitcafe 的一个问题

[hongfeiyu]

部署的时候是不是两个 git 用的邮箱必须是同一个？
因为这样才会 ssh 一样
还是说不一样也可以？
然后多生成一个 ssh?

这个报错是因为没有同步 ssh 吗？
Warning: Permanently added 'gitcafe.com,124.42.117.218' (RSA) to the list of known hosts.
Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
FATAL Something's wrong. Maybe you can find the solution here: http://hexo.io/docs/troubleshooting.html
Error: Warning: Permanently added 'gitcafe.com,124.42.117.218' (RSA) to the list of known hosts.
Permission denied (publickey).
fatal: Could not read from remote repository.

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

at ChildProcess.<anonymous> (D:\hexo\node_modules\hexo-deployer-git\node_modules\hexo-util\lib\spawn.js:42:17)
at emitTwo (events.js:87:13)
at ChildProcess.emit (events.js:172:7)
at maybeClose (internal/child_process.js:818:16)
at Socket.<anonymous> (internal/child_process.js:319:11)
at emitOne (events.js:77:13)
at Socket.emit (events.js:169:7)
at Pipe._onclose (net.js:469:12)

[hongfeiyu]

求解啊求解，为什么没有大神来解答一下？
如果 gitcafe 和 github 的用户名不一样的话
就得 git config --global user.name 两次
他们不会冲突吗？