code: def backend_config():
      config = fo.annotation_config.backends.get("labelstudio", {})
      return {
          "url": config.get(
              "url",
              os.getenv(
                  "FIFTYONE_LABELSTUDIO_URL", "http://localhost:8080"
              ),
          ),
          "api_key": config.get(
              "api_key", os.getenv("FIFTYONE_LABELSTUDIO_API_KEY")
          ),
      }
  
imports: import os
  import random
  import numpy
  import pytest
  import fiftyone
  import fiftyone.zoo
  import fiftyone.utils.labelstudio
  import fiftyone.core.labels
label_desc: Use image node_id 1 for calling a global function with example usage: backend_config() and returns: dict