git - github 代码空间上的 git 子模块

Question

我对 github 代码空间上的子模块有问题。

当我使用命令时

git submodule update --init

终端给我看

Warning: Permanently added 'github.com,xxxxx' (ECDSA) to the list of known hosts.
    git@github.com: Permission denied (publickey).
    fatal: Could not read from remote repository.
    
    Please make sure you have the correct access rights
    and the repository exists.