code: def audit_1_3(self):
          
          for row in self.credential_report:
              for access_key in "1", "2":
                  if json.loads(row["access_key_{}_active".format(access_key)]):
                      last_used = row["access_key_{}_last_used_date".format(access_key)]
                      if last_used != "N/A" and self.parse_date(last_used) < datetime.now(tzutc()) - timedelta(days=90):
                          msg = "Active access key {} in account {} last used over 90 days ago"
                          raise Exception(msg.format(access_key, row["user"]))
docs: 1.3 Ensure credentials unused for 90 days or greater are disabled (Scored)