I am using the [aws provisioner plugin](https://github.com/mitchellh/vagrant-aws) to start an ec2 instance. First I have to use the aws cli to generate credentials that are pasted into the Vagrant file. This gets tiring and in order to automate it I started reading up on [Vault](https://www.vaultproject.io/). After a few hours I know more about Vault but not much about how to use it with Vagrant. Are they not intended to be used together?