if you don't mind, could you help me understand this script better?

[realyukii]

I read the wiki page on setting up sshd daemon, here's the output of the script:

#  sh setup_openssh_for_windows_only.sh
ssh-keygen: generating new host keys: RSA ECDSA ED25519
The user name could not be found.

More help is available by typing NET HELPMSG 2221.

The command completed successfully.

cygrunsrv: Error removing a service: OpenService:  Win32 error 1060:
The specified service does not exist as an installed service.

The MSYS2 sshd service is starting.
The MSYS2 sshd service was started successfully.

it 'somehow' call ssh-keygen, but I don't see any line in the script that execute ssh-keygen, I just saw it on sanity check, is it called implicitly? I tried to learn how the script works under the hood.

it also shows a message that looks like an error but the script seems work just fine at the end of the script.