I am unable to connect through SSH to my GCE instance. I was connecting without any problem, the only think I changes was my user name through top right corner of the browser then selected `Change Linux Username`.

When I try to ssh into my google engine via browser, I keep having following message in a endless loop:

[![enter image description here](https://i.stack.imgur.com/WtJyg.png)](https://i.stack.imgur.com/WtJyg.png)

When I try to ssh via cloud shell I also get following error message, (*serial console output*):

```
Permission denied (publickey).
ERROR: (gcloud.compute.ssh) [/usr/bin/ssh] exited with return code [255].

```

**[Q]** Is there any way to fix this problem? Since I have no access to the engine now, I don't know what to do.