To Reset Oracle Apps User id and Password From Backend

DECLARE
  v_user_name    VARCHAR2(30):=upper('HCM'); --HCM is username of my oracle Apps.
  v_new_password VARCHAR2(30):='welcome1';
  v_status       BOOLEAN;
BEGIN
  v_status   := fnd_user_pkg.ChangePassword ( username => v_user_name, newpassword => v_new_password );
  IF v_status =true THEN
    dbms_output.put_line ('The password reset successfully for the User:'||v_user_name);
    COMMIT;
  ELSE
    DBMS_OUTPUT.put_line ('Unable to reset password due to'||SQLCODE||' '||SUBSTR(SQLERRM, 1, 100));
    ROLLBACK;
  END IF;
END;
/