Access the values of attributes from get method

[ncode]

Use Case

Allow credentials to be passed to the provider without storing those on the local machine

Describe the Solution You Would Like

    vault_secret_engine { 'nomad':
      type        => 'nomad',
      ensure      => 'present',
      description => 'dynamic token management for nomad',
      vault_token => 'my super token',
    }

Writing providers like this one for vault or even the consul one (https://github.com/solarkennedy/puppet-consul/blob/master/lib/puppet/provider/consul_policy/default.rb) some times require different tokens for each type of operation, the issue is that you don't have access to attributes during get or prefetch and it leads to hacks to make it work. I'd like have access to specific values so it become possible to use these values on API requests without the need to a transport.

[DavidS]

There's a prototype implementation for this in #284 (for #242) - the missing piece there is verifying that the implementation doesn't leak the catalog across agent runs.

[Dan33l]

@jpogran @binford2k is there anything planned about this enhancement ?