gitlab_auth0

https://gitlab.com/help/integration/auth0.md
========= AUTH0 DOCS =============
gitlab_rails['omniauth_providers'] = [
 {
     "name" => "auth0",
     "args" => { client_id: 'YOUR_AUTH0_CLIENT_ID',
     client_secret: 'YOUR_AUTH0_CLIENT_SECRET',
     namespace: 'YOUR_AUTH0_DOMAIN'
        }
    }
  ]

========= 10.2.1-ee gitlab.rb file =============

# gitlab_rails['omniauth_providers'] = [
#   {
#     "name" => "google_oauth2",
#     "app_id" => "YOUR APP ID",
#     "app_secret" => "YOUR APP SECRET",
#     "args" => { "access_type" => "offline", "approval_prompt" => "" }
#   }
# ]