docstr: Removes bearer token from the sharepoint API class (makes it null)
  
  Returns
  None
docstr_tok: ["Removes","bearer","token","from","the","sharepoint","API","class","(","makes","it","null",")","Returns","None"]
code: def disconnect(self) -> None:
      """
      Removes bearer token from the sharepoint API class (makes it null)
  
      Returns
      None
      """
      self.bearer_token = None
      self.is_connected = False
  
imports: from datetime import datetime, timezone
  from typing import Text, List, Dict, Any
  from mindsdb.integrations.handlers.sharepoint_handler.utils import bearer_token_request, get_an_entity, delete_an_entity, update_an_entity, create_an_entity
label_desc: Use image node_id 4 for calling the SharepointAPI obj's underlying member method code with example usage: obj.disconnect() without return types