$scope.result = "";
$http({
          method: 'POST',
          url: 'http://localhost:8000/api/v1/user/user_signin',
          data: { username: $scope.user.username, password: $scope.user.password },
          responseType:'json'
        }).then(function successCallback(response) {
             console.log('success');
             $scope.result = response;
             console.log($scope.result);
          }, function errorCallback(response) {
             console.log('error');
             console.log(response);
          });

Object {data: null, status: 200, config: Object, statusText: ""}