var data = {
                grant_type: "password",
                username: userName,
                password: loginPassword
            };

 $http.post("/Token", data)
                 .then(function (response) {
                     alert(JSON.stringify( response.data));
                     return response.data;
                 });

var data = "grant_type=password&username=" + userName + "&password=" + loginPassword;

            $http.post("/Token", data)
                 .then(function (response) {
                     alert(JSON.stringify( response.data));
                     return response.data;
                 });