Git clone recurively

If I run under git bash (windows 10):

$ git clone --recursive
Cloning into ‘openFrameworks’…
The authenticity of host ‘github com (’ can’t be established.
RSA key fingerprint is SHA256:nThbg6kXUpJWGl7E1IGOCspRomTxdCARLviKw6E5SY8.
Are you sure you want to continue connecting (yes/no/[fingerprint])?

I say yes: Permission denied (publickey).
fatal: Could not read from remote repository.

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

you are cloning via ssh. maybe you did not upload your key to your github account?
git clone --recursive should work.
Hope that helps.