Puppet pass SSH keys to VM for us in Git - linux

Question

I'm using Vagrant to provision a VM onto DigitalOcean using config from PUPHPET. I need to clone a private git repo. I've created an SSH key to be used to authenticate the request using the Puppet vcsrepo module but it seems my SSH key isn't being picked up properly.
I've set Vagrant config.ssh.forward_agent to true and config.ssh.private_key_path points to my local rsa file on my mac. This is also used for the DigitalOcean key.
I can see my key in ~/.ssh/authorized_keys on the VM.
The git clone fails if it's a private repo. I tried with a public repo and it is successful.
Here is the Puppet vcsrepo command:
vcsrepo { '/var/www/html':
ensure => present,
provider => git,
source => 'https://******#bitbucket.org/****.git',
require => '~/.ssh/authorized_keys',
}
This gives the error No title provided and "~/.ssh/authorized_keys" is not a valid resource reference at /tmp/vagrant-puppet/manifests-893fcd
I also tried with the identity property:
vcsrepo { '/var/www/html':
ensure => present,
provider => git,
source => 'https://******#bitbucket.org/****.git',
identity => '~/.ssh/authorized_keys',
force => true
}
This gives fatal: could not read Password for 'https://billyjones#bitbucket.org': No such device or address
Using Debian 7.