title: Get Html response with Retrofit
body: <p>I'm new to Retrofit. I make a POST request to a website. Website returns response as HTML. So I will parse it. However Retrofit try to parse it as JSON. How can do it?</p>
  
  <pre><code>@FormUrlEncoded
  @POST("/login.php?action=login")
  void postCredentials(@Field("username") String username, 
                       @Field("password") String password);
  </code></pre>
  
  <p>Should I use a callback?﻿</p>