title: Use GitLab API from a GitLabCI build script
body: <p>I have a GitLab CI build script like this:</p>
  
  <pre><code>create release:
    stage: deploy
    tags:
      - basic
    only:
      - tags
    script:
      - GITLOG=$(echo "# Changes Log"; git log `git tag | tail -2 | head -1`..${CI_BUILD_TAG} --pretty=format:" - %s")
      - curl -X POST -d "private_token=$CI_BUILD_TOKEN&amp;description=$GITLOG" "http://git.example.com/api/v3/projects/${CI_PROJECT_ID}/repository/tags/${CI_BUILD_TAG}/release"
  </code></pre>
  
  <p>The purpose of this step is to automatically add a Changes Log from Git in the GitLab Releases section.</p>
  
  <p>That works if I manually run this on the command line and put in the variables... </p>
  
  <p>The problem is that the value of <code>CI_BUILD_TOKEN</code> in the build runner isn't a valid GitLab Private Token - it's only a token to connect to the Docker Registry - as per the documentation.</p>
  
  <p>Is there a way to get a valid GitLab API token that the build runner can use to access the API for the project it's running a build for? Seems like this should be possible.</p>
  
  <p>GitLab Runner:</p>
  
  <pre><code>gitlab-runner -v
  Version:      1.2.0
  Git revision: 3a4fcd4
  Git branch:   HEAD
  GO version:   go1.6.2
  Built:        Sun, 22 May 2016 20:05:30 +0000
  OS/Arch:      linux/amd64
  </code></pre>