code: def initialize(self, app):
      self.tabpy_state = app.tabpy_state
      # set content type to application/json
      self.set_header("Content-Type", "application/json")
      self.protocol = self.settings[SettingsParameters.TransferProtocol]
      self.port = self.settings[SettingsParameters.Port]
      self.python_service = app.python_service
      self.credentials = app.credentials
      self.username = None
      self.password = None
      self.eval_timeout = self.settings[
          SettingsParameters.EvaluateTimeout
      ]
      self.max_request_size = app.max_request_size
  
      self.logger = ContextLoggerWrapper(self.request)
      self.logger.enable_context_logging(
          app.settings[SettingsParameters.LogRequestContext]
      )
      self.logger.log(
          logging.DEBUG, "Checking if need to handle authentication"
      )
      self.auth_error = self.handle_authentication("v1")
  
imports: import base64
  import binascii
  import concurrent
  import json
  import logging
  import tornado.web
  from tabpy.tabpy_server.app.app_parameters import SettingsParameters
  from tabpy.tabpy_server.handlers.util import hash_password
  from tabpy.tabpy_server.handlers.util import AuthErrorStates
  import uuid
label_desc: Use image node_id 1 for calling the BaseHandler obj's underlying member method code with example usage: obj.initialize(app) without return types