title: Find all children nodes of a particular node until the leaf node
body: <p>I'm new to Neo4j and trying to figure out a way to get all the children nodes of a node. Here's my graph model:
  <a href="https://i.stack.imgur.com/f6LKR.png" rel="nofollow noreferrer">Graph Model</a></p>
  
  <p>As you can see, the root node is an <strong>SecurityGroup</strong> node which may have <strong>SecurityGroup</strong> nodes under it or <strong>User</strong> nodes under it. I need to find all the children nodes(both User and SecurityGroups) of the root <strong>SecurityGroup</strong> node until there is no more nesting.</p>