readUserFragment function

const readUserFragment = client => {
  const data = client.readFragment({
    id,
    fragment: GET_SINGLE_USER_FRAGMENT,
  });

  if (!data) {
    return <h3>No data found in cache! Try visiting the home screen then returning here.</h3>
  }

  console.log(data);

  return <h3>Success!</h3>
};