code: def unauthenticate(self):
          
          self.username = ""
          self.password = ""
          self.tenant_id = ""
          self.tenant_name = ""
          self.token = ""
          self.expires = None
          self.region = ""
          self._creds_file = None
          self.api_key = ""
          self.services = utils.DotDict()
          self.regions = utils.DotDict()
          self.authenticated = False
docs: Clears out any credentials, tokens, and service catalog info.