Post api github

Hello,

I'm having trouble getting a post to github's api, I get this error in mozilla:

Blocked cross-origin request: Same Origin Policy prevents the remote resource from being read at link . (Reason: 'access-control-allow-origin' symbol missing in the CORS 'Access-Control-Allow-Headers' header during CORS pre-connection).

And in Chrome:

link 401 (Unauthorized)

Follow my code:

myApp.controller('postCtrl', function($scope, $http){
    $scope.form = {};

        $scope.submitForm = function() {
        $http({
          method  : 'POST',
          url     : 'https://api.github.com/repos/marcobrito/frontEnd/issues',
          data    : $scope.form, //forms user object
          headers : {'Content-Type': 'application/x-www-form-urlencoded', 'Authorization': '094a87044657ca7859dd9b151a08d53ae4a0bad2', 'Access-Control-Allow-Origin': '*', 'Status': '203'} 
         })
          .success(function(data) {
            if (data.errors) {

            } else {
              console.log(errors)
            }
          });
        };
    });

Can anyone help me?