old_contents: var callisto = require('callisto');
  var users = require('./lib/users.js');
  var sqlite3 = require('sqlite3').verbose();
  var db = new sqlite3.Database('database.db3');
  
  callisto.server({
      port: 8090,
      root: 'www'
  });
  
  callisto.addModule('users', users);
new_contents: var callisto = require('callisto');
  var users = require('./lib/users.js');
  var sqlite3 = require('sqlite3').verbose();
  global.db = new sqlite3.Database('database.db3');
  
  
  callisto.server({
      port: 8090,
      root: 'www'
  });
  
  callisto.addModule('users', users);
subject: Add db to the global variables