code: function TwitterAPIConnection(n) {
          RED.nodes.createNode(this,n);
          var node = this;
          node.consumerKey = n.consumerKey;
          node.consumerSecret = n.consumerSecret;
          node.accessToken = n.accessToken;
          node.accessSecret = n.accessSecret;
  
          var id = node.consumerKey;
  
          node.log('create new Twitter instance for: ' + id);
          
          clients[id] = new Twit({
              consumer_key: node.consumerKey,
              consumer_secret: node.consumerSecret,
              access_token: node.accessToken,
              access_token_secret: node.accessSecret
          });
          
          node.client = clients[id];
  
          this.on("close", function() {
              node.log('delete Twitter instance on close event');
              delete clients[id];
          });
      }
docs: handle the connection to the Twitter API