class_docstr: ZAP authentication for use in the tornado IOLoop
docstr: Stop ZAP authentication
docstr_tok: ["Stop","ZAP","authentication"]
code: def stop(self):
      """Stop ZAP authentication"""
      if self.zap_stream:
          self.zap_stream.close()
          self.zap_stream = None
      super(IOLoopAuthenticator, self).stop()
  
imports: from tornado import ioloop
  from zmq.eventloop import zmqstream
  from .base import Authenticator
label_desc: Use image node_id 3 for calling the IOLoopAuthenticator obj's underlying member method code with example usage: obj.stop() without return types