class_docstr: Stores credentials UNENCRYPTED on the Python runtime stack.
  
  It is ephemeral and is only readable by the current Python process... hopefully.
class_docstr_tok: ["Stores","credentials","UNENCRYPTED","on","the","Python","runtime","stack",".","It","is","ephemeral","and","is","only","readable","by","the","current","Python","process","...","hopefully","."]
code: def clear(cls):
      cls.CREDENTIALS_STORE.clear()
  
imports: import json
  import os
  import shutil
  import tempfile
  from abc import abstractmethod
  from botocore.exceptions import ClientError
  from streamalert.shared.helpers.aws_api_client import AwsKms, AwsSsm
  from streamalert.shared.logger import get_logger
label_desc: Use image node_id 5 for calling the EphemeralUnencryptedDriver obj's underlying member method code with example usage: obj.clear(cls) without return types