def all_build_trains(app_id: nil, platform: 'ios')
      platform = 'ios' if platform.nil?
      r = request(:get, "ra/apps/#{app_id}/buildHistory?platform=#{platform}")
      handle_itc_response(r.body)
    end
def all_build_trains(app_id: nil, platform: 'ios')
      platform = 'ios' if platform.nil?
      r = request(:get, "ra/apps/#{app_id}/buildHistory?platform=#{platform}")
      handle_itc_response(r.body)
    end
All build trains, even if there is no TestFlight