title: Check if a child is present or not, and retrive simple data from firebase
body: <p><a href="https://i.stack.imgur.com/92ttI.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/92ttI.png" alt="enter image description here"></a></p>
  
  <p>This is a my <code>firebase</code> database. Here in the first node I have a child <strong>BeenThere</strong>, and in the second I don't. I want to check if that <strong>BeenThere</strong> exists and if not create one, and if exists, how to retrieve it simply, without any model or callbacks? Is is possible?</p>