title: Ext.data.JsonP request Unexpected token :
body: <p>I want to make call to authenticate user and get back token in json file. I use Ext.data.JsonP but when I call it display Uncaught SyntaxError: Unexpected token : in browser.
  I can't use Ext.Ajax because it's on another domain.
  Here is code:</p>
  
  <pre><code>Ext.data.JsonP.request({
          url : 'myurl',
  
  
          success : function(result) {
  
  
              alert('success');
          },
          failure : function(result) {
              alert('failure');
          },
          callback : function(result) {
              alert('callback');
          }
      });
  </code></pre>
  
  <p>And this is expected result:</p>
  
  <pre><code>{"token":"MTAwNTI7V00yWkdVMFlqZDtkMDExZWU4YmU4ZTdlM2RjYzNkYzU3OThhYWViYjk4YmMxMzY2NTY2"}
  </code></pre>
  
  <p>Can somebody tell me what's causing Unexpected token : error?
  Or other way how to get response.
  Thanks</p>