osem-fcy/app/views/devise/shared/_openid_links.html.haml

.text-center
  .btn-group.btn-group-lg#openid-btn-grp
    - omniauth_configured.each do |provider|
      = link_to "user_#{provider}_omniauth_authorize".to_sym, class: "btn btn-success btn-lg",
                                                        id: "omniauth-#{provider}",
                                                        title: "Your #{provider} login",
                                                        method: :post do
        %i{class: "fa fa-#{provider}"}