code: def validate_account_id(sts_client, account_id):
      
      resp = sts_client.get_caller_identity()
      if 'Account' in resp:
          if resp['Account'] == account_id:
              LOGGER.info('Verified current AWS account matches required '
                          'account id %s.',
                          account_id)
          else:
              LOGGER.error('Current AWS account %s does not match '
                           'required account %s in Runway config.',
                           resp['Account'],
                           account_id)
              sys.exit(1)
      else:
          LOGGER.error('Error checking current account ID')
          sys.exit(1)
docs: Exit if get_caller_identity doesn't match account_id.