code: def copySshKeys(self, keyName):
          
          if keyName == 'core':
              return # No point.
  
          # Make sure that keys are there.
          self._waitForSSHKeys(keyName=keyName)
  
          # copy keys to core user so that the ssh calls will work
          # - normal mechanism failed unless public key was in the google-ssh format
          # - even so, the key wasn't copied correctly to the core account
          keyFile = '/home/%s/.ssh/authorized_keys' % keyName
          self.sshInstance('/usr/bin/sudo', '/usr/bin/cp', keyFile, '/home/core/.ssh', user=keyName)
          self.sshInstance('/usr/bin/sudo', '/usr/bin/chown', 'core',
                           '/home/core/.ssh/authorized_keys', user=keyName)
docs: Copy authorized_keys file to the core user from the keyName user.