title: angular 4 httpGet withCredentials and header conflict
body: <p>for sending cookie to server I must use { withCredentials: true } in options parameter,But When I use</p>
  
  <pre><code>    this.http.get(this.accountUrl + 'ExternalLoginConfirmation', { 
      withCredentials: true })
  </code></pre>
  
  <p>I get the following error :</p>
  
  <pre><code>    Response to preflight request doesn't pass access control check: The 
      value 
      of the 'Access-Control-Allow-Origin' header in the response must not be 
      the 
      wildcard '*' when the request's credentials mode is 'include'. Origin 
      'http://localhost:4202' is therefore not allowed access. The credentials 
      mode of requests initiated by the XMLHttpRequest is controlled by the 
      withCredentials attribute.
  </code></pre>
  
  <p>Odd thing : There isn't any error when I call this url by browser</p>
  
  <p>Could you help me?</p>