code: def _save_credentials_to_file(self, creds, creds_file):
      with open(creds_file, "w") as f:
          f.write(json.dumps(creds))
  
file_path: mindsdb/mindsdb/integrations/handlers/utilities/auth_utilities/microsoft/ms_graph_api_auth_utilities.py
imports: import json
  from flask import request
  import msal
  from ..exceptions import AuthException
  from mindsdb.integrations.handlers.utilities.api_utilities import MSGraphAPIBaseClient
  from mindsdb.utilities import log
label_desc: Use image node_id 4 for calling the MSGraphAPIAuthManager obj's underlying member method code with example usage: obj._save_credentials_to_file(creds, creds_file) without return types