It is possible to create a quick login for your helpdesk via Gitlab. To activate the quick login you need to enable OAuth for Gitlab.
To register an app in Gitlab open your profile and select applications.
As callback URL enter "https://zammad_host/auth/gitlab/callback" where zammad_host has to be replaced with your Zammad FQDN
At the moment we need the "api" scope. This is caused due a bug in Gitlab: https://gitlab.com/gitlab-org/gitlab-ce/issues/33022
Enter the "APP ID" and the "APP SECRET" from the Gitlab OAUTH Applications Dashboard. .. image:: /images/system/thirdparty/zammad_connect_gitlab_thirdparty_zammad.png
alt: Gitlab config in Zammad admin interface
After you configured the Gitlab credentials and activated the login method, you should see a new icon on the login page.
If you click on the icon you will be redirected to Gitlab and see something similar to this:
When you grant the access you will be redirected to your Zammad instance and logged in as a customer.
Now you can link accounts via "Avatar -> Profile -> Link Accounts" or login via Zammad login page.