How to create a user with Puppet

I am trying to create a user with Puppet but everything I have been trying has failed.

I am trying to create a user named "capistrano" that will be placed in the "www-data" group. I have done the following configuration.

class capistranoDeps::user {
    user { "capistrano":
        ensure => present,
        comment => "Capistrano user",
        gid => 33,
        shell => "/bin/bash",
        require => Group["capistrano"],
    }
    group {"capistrano":
        ensure => present,
    }
}


class capistranoDeps::config {
    require capistranoDeps::user
    # Set permissions on webserver directories
    file {"/var/www/":
        ensure => directory,
        owner  => "capistrano",
        group  => "www-data",
        mode   => "775",
    }
...
}
class capistranoDeps {
    require tools
    include capistranoDeps::user,capistranoDeps::config
}

When I try to execute this config on my host, I get the following error :

root@app1:/etc/openvpn# puppet agent --server=puppet.domain --no-daemonize --verbose
notice: Starting Puppet client version 2.6.2
info: Caching catalog for app1.domain
err: Could not run Puppet configuration client: Could not find user capistrano

The user has not already been created on the host as it is Puppet's job to do so. The examples I have found all over seem to be the same as this but since this isn't working, I am definitely missing something.