title: Accessing GitLab access token in Jenkins plugin
body: <p>I have built a Jenkins custom plugin that access Git repos (GitLab) that requires a username and associated GitLab access token. That is fine. But in Jenkins Credentials page, there is already an entry created for GitLab API token for webhook and a username. I would like to use the token in the Credentials page instead of defining in the plugin myself. How can I programmatically extract the credential entry from my Jenkins plugin?</p>
  
  <p>Thanks.</p>