title: Change Gitlab CI Runner user
body: <p>Currently when I start a build in GitlabCI it is running under gitlab-runner user. I want to change it the company's internal user. I didn't find any parameter to the /etc/gitlab-runner/config.toml which is solve that.</p>
  
  <p>My current configuration: </p>
  
  <pre><code>concurrent = 1
  [[runners]]
    name = "deploy"
    url = ""
    token = ""
    executor = "shell"
  </code></pre>