title: How do not repeat nodes that has the same code in diferent paths
body: <p>I am new with Node-Red and I have the next question: </p>
  
  <p>I have a flow that in every http in paths (/home, /global, /add) I have to check if the user is connected. This means I have to repeat the authentication nodes and other stuff for every path. But I was thinking: How can I do it for not repeat it? By the way the real project has like 30 paths, I said this 3 only like example. </p>
  
  <p>The only solution I thought is make links and save one variable for know which one link is for every path. But I am pretty sure there is a better way. </p>