docs: def update_soa_serial(args):
      """Update SOA serial.
  
      Argument:
  
          args: arguments object
      """
      password = get_password(args)
      token = connect.get_token(args.username, password, args.server)
      soa_content = dict(domain=args.domain)
      if args.__dict__.get('mname'):
          soa_content['mname'] = args.mname
      if args.__dict__.get('rname'):
          soa_content['rname'] = args.rname
      if args.__dict__.get('refresh'):
          soa_content['refresh'] = args.refresh
      if args.__dict__.get('retry'):
          soa_content['retry'] = args.retry
      if args.__dict__.get('expire'):
          soa_content['expire'] = args.expire
      if args.__dict__.get('minimum'):
          soa_content['minimum'] = args.minimum
      processing.update_soa_serial(args.server, token, soa_content)