AAD Graph Server Final

var clientID = "<YOUR-CLIENT-ID>";
var raw_key = "<YOUR-KEY>";
var tenant_domain = "<YOUR-TENANT-DOMAIN>";
  
exports.get = function (request, response) {
    if (request.user.level == 'anonymous') {
        response.send(statusCodes.UNAUTHORIZED, null);
        return;
    }
    var errorHandler = function (err) {
        console.error(err);
        response.send(statusCodes.INTERNAL_SERVER_ERROR, err);
    };
    request.user.getIdentities({
        success: function (identities) {
            var objectId = identities.aad.oid;
            getAADToken(function (err, access_token) {
                if (err) errorHandler(err);
                else getUser(access_token, objectId, function (err, user_info) {
                    if (err) errorHandler(err);
                    else response.send(statusCodes.OK, user_info);
                    });
            });
        },
        error: errorHandler
    });
};
 
function getAADToken(callback) {
    var req = require("request");
    var key = encodeURIComponent(raw_key);
    var options = {
        url: "https://login.windows.net/" + tenant_domain + "/oauth2/token?api-version=1.0",
        method: 'POST',
        form: {
            grant_type: "client_credentials",
            resource: "https://graph.windows.net",
            client_id: clientID,
            client_secret: raw_key
        }
    };
    req(options, function (err, resp, body) {
        if (err || resp.statusCode !== 200) callback(err, null);
        else callback(null, JSON.parse(body).access_token);
    });
}
 
function getUser(access_token, objectId, callback) {
    var req = require("request");
    var options = {
        url: "https://graph.windows.net/" + tenant_domain + "/users/" + objectId + "?api-version=1.0",
        method: 'GET',
        headers: {
            "Authorization": "Bearer " + access_token
        }
    };
    req(options, function (err, resp, body) {
        if (err || resp.statusCode !== 200) callback(err, null);
        else callback(null, JSON.parse(body));
    });
};