title: Playframework JSR-303 validated "field" does not have a corresponding accessor for data binding
body: <p>When I have added this following code to my project </p>
  
  <pre><code>Form&lt;User&gt; filledForm2 = userSignupForm.bindFromRequest();
  </code></pre>
  
  <p>It has stopped working by showing an error message which states:</p>
  
  <pre><code>Execution exception
  [IllegalStateException: JSR-303 validated property 'Password' does not have a corresponding accessor for data binding - check your DataBinder's configuration (bean property versus direct field access)]
  </code></pre>
  
  <p>My <code>User</code> class was like that:</p>
  
  <pre><code>class User{
  String username;
  String Password;
  }
  </code></pre>
  
  <p>Now how can to check/modify DataBinder's configuration in java play framework?</p>