Add System Admin responsibility to a user

BEGIN
   FND_USER_PKG.ADDRESP(
      USERNAME        =>  UPPER('AMOHSIN'),  -- username
      RESP_APP        =>  'SYSADMIN',
      RESP_KEY        =>  'SYSTEM_ADMINISTRATOR',
      SECURITY_GROUP  =>  'STANDARD',
      DESCRIPTION     =>  'DESCRIPTION',
      START_DATE      =>  SYSDATE,
      END_DATE        =>  NULL);

   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;