convert arrow function to normal function javascript online
export const loadUser = () => (dispatch, getState) => {
  if (!getState().auth.token) {
    dispatch({ type: LOGIN_FAIL });
    return;
  }
  // User Loading
  dispatch({ type: USER_LOADING });
  axios
    .get('/api/auth/user', tokenConfig(getState))
    .then(res => {
      dispatch({
        type: USER_LOADED,
        payload: res.data,
      });
    })
    .catch(err => {
      console.warn(`Error returned: ${err}.`);
      dispatch({
        type: AUTH_ERROR,
      });
    });
};