Reset Oracle Application User Password through API

DECLARE
flag_value BOOLEAN;
BEGIN
flag_value := fnd_user_pkg.changepassword(username=> 'RJAYANTH',newpassword => 'welcome1');
IF flag_value
THEN
DBMS_OUTPUT.PUT_LINE('The password reset successfully');
ELSE
DBMS_OUTPUT.PUT_LINE('The password reset has failed');
END IF;
END;
/
COMMIT;