code: def reset_credentials_file():
      ensure_local_plotly_files()  # make sure what's there is OK
      utils.save_json_dict(CREDENTIALS_FILE, {})
      ensure_local_plotly_files()
  
imports: from __future__ import absolute_import
  import urllib
  import warnings
  import copy
  from _plotly_utils import optional_imports
  import _plotly_utils.exceptions
  from _plotly_utils.files import ensure_writable_plotly_dir
  from chart_studio import session, utils
  from chart_studio.files import CONFIG_FILE, CREDENTIALS_FILE, FILE_CONTENT
label_desc: Use image node_id 5 for calling a global function with example usage: reset_credentials_file() without return types