Getting the below ssh error during the packer baking process.

Describe the problem and include the following information:

• Packer version from packer version
  % packer --version
  1.2.3
  %

• Host platform
  MAC/Linux

% packer build hana.json
googlecompute output will be in this color.

==> googlecompute: Checking image does not exist...
==> googlecompute: Creating temporary SSH key for instance...
==> googlecompute: Using image: rhel-7-v20180522
==> googlecompute: Creating instance...
googlecompute: Loading zone: us-west1-b
googlecompute: Loading machine type: n1-standard-4
googlecompute: Requesting instance creation...
googlecompute: Waiting for creation operation to complete...
googlecompute: Instance has been created!
==> googlecompute: Waiting for the instance to become running...
googlecompute: IP: 35.233.171.204
==> googlecompute: Waiting for SSH to become available...

==> googlecompute: Error waiting for SSH: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain
==> googlecompute: Deleting instance...
googlecompute: Instance has been deleted!
==> googlecompute: Deleting disk...
googlecompute: Disk has been deleted!
Build 'googlecompute' errored: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain

==> Some builds didn't complete successfully and had errors:
--> googlecompute: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain

==> Builds finished but no artifacts were created.

Thanks,
Pradeep Kumar A