To add and delete a responsibilities to user from DataBase(Backend)

--API to add responsibilities to a user

BEGIN
  fnd_user_pkg.addresp(username =>'XXTEST',
                       resp_app =>'SYSADMIN',
                       resp_key =>'SYSTEM_ADMINISTRATOR',
                       security_group =>'STANDARD',
                       description => NULL,
                       start_date =>TO_DATE('01-JAN-2000'),
                       end_date =>NULL );
  COMMIT;
END;

/
(or)
/
declare
  l_user_name      VARCHAR2(100) := UPPER('XXTEST');
  l_resp_key       VARCHAR2(100) := 'SYSTEM_ADMINISTRATOR';
  l_app_short_name VARCHAR2(100);
BEGIN
  SELECT application_short_name
INTO l_app_short_name
FROM fnd_application fa,
  fnd_responsibility fr
WHERE fa.application_id = fr.application_id
AND TRUNC(sysdate) BETWEEN start_date AND NVL(end_date, '31-dec-4712')
AND fr.responsibility_key = l_resp_key;
fnd_user_resp_groups_api.load_row
                              (x_user_name           => l_user_name,
                               x_resp_key            => l_resp_key,
                               x_app_short_name      => l_app_short_name ,
                               x_security_group      => 'STANDARD',
                               x_owner               => 'CUST',
                               x_start_date          => TO_CHAR ( SYSDATE, 'YYYY/MM/DD'),
                               x_end_date            => NULL,
                               x_description         => NULL
                              );

commit;
end;
/
--API to remove responsibilities from that user

BEGIN
  fnd_user_pkg.delresp(username =>'XXTEST',
                       resp_app =>'SYSADMIN',
                       resp_key =>'SYSTEM_ADMINISTRATOR',
                       security_group =>'STANDARD' );
  COMMIT;
END;