title: Login with $cordovaOauth in Facebook returns null data
body: <p>I am using $cordovaOauth to authenticate on an Ionic app (angular/cordova) but after settings everything on developers.facebook.com and getting the access_token I call again to get user data, but it returns an error with data=null.</p>
  
  <p>Code:</p>
  
  <pre><code>  $scope.facebookLogin = function() {
      $cordovaOauth.facebook(FACEBOOK_ID, ["email", "public_profile"], {
        redirect_uri: "http://localhost/callback"
      }).then(function(result) {
        var access_token = result.access_token;
        //console.log(JSON.stringify(result));
  
        $http.get("https://graph.facebook.com/v2.2/me", {
          params: {
            access_token: access_token,
            fields: "first_name,last_name,gender,picture,locale",
            format: "json"
          }
        }).then(function(result) {
          console.log("RETURN: " + JSON.stringify(result)); // Here is where I see that JSON data
        }, function(error) {
          alert("Error: " + error);
        });
  
      }, function(error) {
        console.log(error);
      });
    }
  </code></pre>
  
  <p>And here is the returned JSON:</p>
  
  <pre><code>{
    "data": null,
    "status": -1,
    "config": {
      "method": "GET",
      "transformRequest": [null],
      "transformResponse": [null],
      "params": {
        "access_token": "EAAS8ChUdfHEBALdJimUl5TA1sfWGZAZBv8lxlRlpcSaMhKo1NQX5JEgVuTjjpYP4agdZBZCXO0vwFJs0kLXr5CEz2h35JPZAhls9ZBVyyuwfQFlfWQkFDyGMVxsZBmGZA0s6F6XO97HpJRd7c7iZCuwEHhZAKfnMdoKerT0s5HHPW3xAZDZD",
        "fields": "first_name,last_name,gender,picture,locale",
        "format": "json"
      },
      "url": "https://graph.facebook.com/v2.2/me",
      "headers": {
        "Accept": "application/json"
      },
      "withCredentials": true
    },
    "statusText": ""
  }
  </code></pre>
  
  <p>Anybody has an idea of what's wrong?</p>