       url: "/api/v1/project/#{@project_name()}/invite/#{user.login}"
 
   refresh: () =>
-    @paying_user(null)
     $.getJSON "/api/v1/project/#{@project_name()}/settings", (data) =>
       @updateObservables(data)
 

  parallelism_cost: (plan, p) =>
    @raw_parallelism_cost(p) - @raw_parallelism_cost(plan.min_parallelism)

  concurrency_cost: (plan, c) ->
    if plan.concurrency == "Unlimited"
      0

      url: "/api/v1/project/#{@project_name()}/settings"
      data: JSON.stringify
        parallel: @parallel()
      error: (data) =>
        @refresh()
        @load_paying_user()
    true # TODO: make this reflect what is happening on the server

  parallel_input_id: (num) =>
