TRIGGER TO RECORD WHEN SOMEONE ADDS ROWS

Question

Hello,
I am trying to write a trigger that will timestamp who adds rows to a table,
I must be close but sql developer is telling me that i dont have enough values.. does anybody know what is missing here? my table has 3 cols, the pk, username and date_entered
thank you Very much in advance
CREATE OR REPLACE
TRIGGER REGISTRAR_ENTRADAS
AFTER INSERT ON EVALUATION
FOR EACH ROW
BEGIN
insert into audit_record_tb1
values(sys_content('userenv','current_user'),
sysdate);
END;
Alvaro

Answer 1

thank you to you two very much i dont know how to give a correct one to you two, i know you both have it right but i have exactly this
CREATE OR REPLACE
TRIGGER REGISTRAR_ENTRADAS
AFTER INSERT ON EVALUATION
FOR EACH ROW
BEGIN
insert into audit_record_tb1(user_value, date_recorded)
values(sys_content('userenv','current_user'),sysdate);
END;
and for some strange reason i am getting an error saying that sys_content is an invalid identifier
and my table, well yes, as easy as in the example create table audit_record_tb1 (user_value varchar2(25), date_recorded date);