@abc.abstractmethod
  def AddMetadata(self, metadata, benchmark_spec):
    raise NotImplementedError()
Retrieve a user code from google's device login API.  The given callback will
dataset/ETHPy150Open GoogleCloudPlatform/PerfKitBenchmarker/perfkitbenchmarker/publisher.py/MetadataProvider.AddMetadata--crossover with--dataset/ETHPy150Open viewfinderco/viewfinder/backend/watchdog/scenario.py/ScenarioDevice.GetUserCode