title: sequelize find and update a record without a model
body: <p>I would like to update a database record using sequelize.js and mysql2
  I do not have access to the models folder or either they have not been made so is there a way to update can't find solution all solutions are that i checked are with model name dot update</p>
  
  <pre><code>var Book = db.define(‘books’, {
   title: {
     type: Sequelize.STRING
   },
   pages: {
     type: Sequelize.INTEGER
   }
  })
  
  
  Book.update(
     {title: req.body.title},
     {returning: true, where: {id: req.params.bookId} }
   )
   .then(function([ rowsUpdate, [updatedBook] ]) {
     res.json(updatedBook)
   })
   .catch(e =&gt; console.log(e));
  </code></pre>
  
  <p>I would like your expert solution on that please</p>