You were changing sshd configuration and you put some AllowUsers
or DenyUsers
options in sshd_config
or something like this, which is preventing you from logging in. Not sure what exactly is it from this report.
You can try to log in with different user, but if you are not sure about configuration, it will probably not help.
I'm not familiar with google-compute-engine, but if you can connect using serial console and post you sshd_config
, we can diagnose and probably fix the problem.