title: Association sequelize 3 tables, many to many
body: <p>I have 4 tables</p>
  
  <pre><code>- client
  - project
  - user
  - userProject
  </code></pre>
  
  <p>One Project belongs to client and it needs to have client foreign key client_id.</p>
  
  <p>UserProject has project_id and user_id foreign keys, belongs to project and user.</p>
  
  <p>One user owns the clients of his projects.</p>
  
  <ul>
  <li>How can I list the clients of one user?</li>
  </ul>