code: def setUpClass(cls):
      cls.kwargs = {
          "connection_data": {
              "mode": os.environ.get("MODE"),
              "client_id": os.environ.get("CLIENT_ID"),
              "client_secret": os.environ.get("CLIENT_SECRET"),
          }
      }
      cls.handler = PayPalHandler("test_paypal_handler", **cls.kwargs)
  
file_path: mindsdb/tests/handler_tests/test_paypal_handler.py
imports: import os
  import unittest
  from mindsdb.integrations.handlers.paypal_handler.paypal_handler import PayPalHandler
  from mindsdb.api.executor.data_types.response_type import RESPONSE_TYPE
label_desc: Use image node_id 1 for calling the PayPalHandlerTest obj's underlying member method code with example usage: obj.setUpClass(cls) without return types