How to add System administrator responsibility from backend

Syntax:
fnd_user_pkg.addresp(username => v_user_name
,resp_app => 'SYSADMIN'
,resp_key => 'SYSTEM_ADMINISTRATOR'
,security_group => 'STANDARD'
,description => 'Auto Assignment'
,start_date => SYSDATE - 10
,end_date => SYSDATE + 1000);

EXAMPLE:
BEGIN
fnd_user_pkg.addresp ('USER_NAME','SYSADMIN','SYSTEM_ADMINISTRATOR','STANDARD',
'Add Sysadmin Responsibility to OPERATIONS user using pl/sql', SYSDATE, SYSDATE + 100);
COMMIT;
DBMS_OUTPUT.put_line ('Responsibility Added Successfully');
EXCEPTION
WHEN OTHERS
  THEN
DBMS_OUTPUT.put_line ( ' Responsibility is not added due to ' || SQLCODE || SUBSTR (SQLERRM, 1, 100));
ROLLBACK;
END;