title: Yii multiple user login in an application
body: <p>I am a new in Yii framework, I just setup an application and separate <strong>front-end</strong> &amp; <strong>Back-end</strong> part. Both User can register / log in properly. Now I want to login different user from front-end site.
  Example : <strong>Front-End</strong> user are tow types </p>
  
  <pre><code>                    1. Customer
                      2. Merchant 
  </code></pre>
  
  <p>I want to set different role of theme. How to possible it, Please share with me.</p>