Add sponsors_logins action to OwnersController and update routes

app/controllers/api/v1/owners_controller.rb

@@ -71,4 +71,10 @@ def lookup
     @pagy, @owners = pagy_countless(scope)
     fresh_when @owners, public: true
   end
+
+  def sponsors_logins
+    @host = Host.find_by_name!(params[:host_id])
+    @sponsors_logins = @host.owners.has_sponsors_listing.pluck(:login)
+    render json: @sponsors_logins
+  end
 end

config/routes.rb

@@ -30,6 +30,7 @@
         resources :owners, only:[:index, :show] do
           collection do
             get :lookup
+            get :sponsors_logins
           end
           member do
             get :repositories