docs: def stage_job(self, credentials, job_details, input_files, vm_instance_name):
          """
          Request that a job be staged on a worker(ie. download some files)
          :param credentials: jobapi.Credentials: user's credentials used to download input_files
          :param job_details: object: details about job(id, name, created date, workflow version)
          :param input_files: [InputFile]: list of files to download
          :param vm_instance_name: str: name of the instance lando_worker is running on (this passed back in the response)
          """
          self._send(JobCommands.STAGE_JOB, StageJobPayload(credentials, job_details, input_files, vm_instance_name))