Comment 22 for bug 1569237

hey David a temp fix is to set the username and password for vagrant like so:
```ruby
Vagrant.configure(2) do |config|

  config.vm.define "master" do |master|
    config.ssh.username = "ubuntu"
    config.ssh.password = ""
    master.vm.box = "ubuntu/xenial64"
    master.vm.hostname = "master"
    master.vm.network :private_network, ip: "172.0.0.10"
  end

end
```
please note I've defined those attributes to the box if you want them to apply to all nodes ie your using all the same box you should place all three username password and box out side the define "master" block.