Create authorized_keys and add public key

Hi, I followed these instructions to access PA from bitbucket in order to enable automatic deployments:

I cannot find the authorized_keys file under etc/ssh. So I tried to create one like described here:

But I had no luck. Can somebody please give me an advice how to do this?

[formatted by admin]

The authorized_keys file is in /home/enjoyyourmeal/.ssh directory, where ssh keys are stored as well.