Hi, when I run the following, it errors, any help would be appreciated. $ packer build dev_ami.json My json looks like this: { "variables": { "aws_access_key": "", "aws_secret_key": "" }, "builders": [{ "type": "amazon-ebs", "access_key": "user `aws_access_key`", "secret_key": "user `aws_secret_key`", "region": "eu-west-1", "source_ami": "ami-ca0135b3", "instance_type": "t2.micro", "ssh_username": "ubuntu", "ami_name": "packer-dev-master timestamp | clean_ami_name" }] } Error: ==> Some builds didn't complete successfully and had errors: --> amazon-ebs: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain