title: Sequelize how to check if entry exists in database
body: <p>I need to check if entry with specific ID exists in the database using Sequelize in Node.js</p>
  
  <pre><code>  function isIdUnique (id) {
      db.Profile.count({ where: { id: id } })
        .then(count =&gt; {
          if (count != 0) {
            return false;
          }
          return true;
        });
    }
  </code></pre>
  
  <p>I call this function in an if statement but the result is always undefined </p>
  
  <pre><code>if(isIdUnique(id)){...}
  </code></pre>