code: def test_auto_expiry(self):
      sessions = Sessions(os.path.join(self.data_dir, "sessions"))
      count = len(sessions)
  
      session = sessions.add_session(
          os.path.join(self.download_dir, "dataset.zip"),
          uncompress=True,
          expiry=1,
      )
      assert session
  
      time.sleep(2)
      sessions.remove_expired()
      assert len(sessions) == count
  
imports: import os
  import time
  import unittest
  from monailabel.utils.sessions import Sessions
label_desc: Use image node_id 1 for calling the MyTestCase obj's underlying member method code with example usage: obj.test_auto_expiry() without return types