code: def list_nodes():
      
      token = session.get('token')
      node = nago.core.get_node(token)
      if not node.get('access') == 'master':
          return jsonify(status='error', error="You need master access to view this page")
  
      nodes = nago.core.get_nodes().values()
      return render_template('nodes.html', **locals())
docs: Return a list of all nodes