title: Install private github package from package.json on Github Actions
body: <p>I'm trying to implement Github actions as a CI on my project. The problem is that I'm using private git URL on my package.json but CI gets an error because Github actions "somehow" doesn't have access to that repo which it's impossible because it's on the same user account.</p>
  
  <p>Does anyone have any idea how to figure this out?</p>
  
  <p><strong>main.workflow</strong> file:</p>
  
  <pre><code>workflow "Github Actions" {
    on = "pull_request"
    resolves = ["Danger JS"]
  }
  
  action "Build" { &lt;-------- This gets error
    uses = "actions/npm@master"
    args = "install"
  }
  
  action "Linter" {
    uses = "actions/npm@master"
    needs = "Build"
    runs = "lint"
  }
  
  action "Test" {
    needs = "Linter"
    uses = "actions/npm@master"
    args = "test"
  }
  
  action "Danger JS" {
    uses = "danger/danger-js@master"
    needs = ["Test"]
    secrets = ["DANGERJS_TOKEN"]
  }
  </code></pre>
  
  <p>Error log:</p>
  
  <pre><code>Successfully built xxxxxxxxxxxxx
  Successfully tagged gcr.io/xxxxxxxxxxxxx
  Pulling image: gcr.io/github-actions-development/action-runner:latest
  latest: Pulling from github-actions-development/action-runner
  xxxxxxxxxxxxx: Pulling fs layer
  xxxxxxxxxxxxx: Verifying Checksum
  xxxxxxxxxxxxx: Download complete
  xxxxxxxxxxxxx: Pull complete
  Digest: sha256:xxxxxxxxxxxxx
  Status: Downloaded newer image for gcr.io/github-actions-development/action-runner:latest
  npm ERR! code ENOGIT
  npm ERR! Error while executing:
  This package is on same user account but github actions doesn't have access anyhow ------&gt; npm ERR! undefined ls-remote -h -t ssh://git@github.com/test-user/react-test-package.git 
  npm ERR! 
  npm ERR! undefined
  npm ERR! No git binary found in $PATH
  npm ERR! 
  npm ERR! Failed using git.
  npm ERR! Please check if you have git installed and in your PATH.
  
  npm ERR! A complete log of this run can be found in:
  npm ERR!     /github/home/.npm/_logs/2018-12-04T13_03_05_291Z-debug.log
  
  ### FAILED Build
  </code></pre>