code: func (r *realisClient) AddInstances(instKey aurora.InstanceKey, count int32) (*aurora.Response, error) {
  
  	r.logger.DebugPrintf("AddInstances Thrift Payload: %+v %v\n", instKey, count)
  
  	resp, retryErr := r.thriftCallWithRetries(func() (*aurora.Response, error) {
  		return r.client.AddInstances(nil, &instKey, count)
  	})
  
  	if retryErr != nil {
  		return nil, errors.Wrap(retryErr, "Error sending AddInstances command to Aurora Scheduler")
  	}
  	return resp, nil
  
  }
docs: // Scale up the number of instances under a job configuration using the configuration for specific
  // instance to scale up.