CloneAssignment.py the authenticity of host 'github...' can't be established

[yugao0912]

Hello,

When I use CloneAssignment.py, it seems that I did not have the right to access the classroom. I have no idea about the preparation for using this file. Could you please help me?

`Cloning into 'Test-diogo'...
The authenticity of host 'github.com (140.82.121.3)' can't be established.
ED25519 key fingerprint is SHA256:+DiY3wvvV6TuJJhbpZisF/zLDA0zPMSvHdkr4UvCOqU.
This key is not known by any other names.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added 'github.com' (ED25519) to the list of known hosts.
git@github.com: Permission denied (publickey).

Thank you.

Best wishes,
Yu
`