configuring omniauth quick example

gistfile1.txt

#add this to my ~git/gitlab/conf/initializers/devise.rb just before the last "end"
  config.omniauth :cas, host: 'serverhost', port: '443', ssl: 'true', login_url: '/cas/login', logout_url: '/cas/confirmLogout', uid_key: 'uid', disable_ssl_verification: false, ssl: true

#In gitlab.yml
omniauth:
  providers:
    - { name: 'cas' }