[RADIATOR] AuthBy SQL Reject or Accept in the SQL results

[Lee Solway]

Is there a way I can set an access Accept or Reject in the MySQL results 
generated by AuthBy SQL?

Currently I have a stored procedure that I call in the following.. I 
would like the SP to be able to reject the Access-Request with an error 
message also if possible..

    AuthSelect            CALL get_reply_attr('%U')
    AuthColumnDef     0, GENERIC, reply
    AuthColumnDef     1, User-Password, check

Thanks,
Lee