meteor-oauth-client.js

var AUTH_URL = "https://api.glitch.com/oauth2/authorize?response_type=code&client_id=000yourclientid000&redirect_uri=http://yoursitehere/oauth/&scope=identity";

var Auth_Router = Backbone.Router.extend({
	routes: {
		"": "root",
		"oauth/?code=:code":	"auth"
	},
	root: function () {},
	auth: function (code)	{
		Meteor.call('authenticate', code, function (error, result) {
			//do something with returned data here
		});
		this.navigate('');
	}
});


Meteor.startup(function () {
	var router = new Auth_Router();
	
	Backbone.history.start({pushState: true});
});

meteor-oauth-server.js

Meteor.methods({
	authenticate: function (auth_code) {
		this.unblock();
		
		var res = Meteor.http.call("POST", "https://api.glitch.com/oauth2/token",
			{params: {
				grant_type : 'authorization_code',
				code: auth_code,
				client_id : secrets.glitch.client_id,
				client_secret : secrets.glitch.client_secret,
				redirect_uri : secrets.glitch.redirect_uri
			}, headers: {
				"content-type": "application/x-www-form-urlencoded"
			}});
		
		if (res.statusCode === 200) {
                        //use the access_token to retrieve something useful, for example
			return auth_check(res.data.access_token);
		}
	}
});

var auth_check = function (token) {
	var res = Meteor.http.call("GET", "http://api.glitch.com/simple/auth.check",
		{params: {
			oauth_token : token
		}});
	
	if (res.statusCode === 200) {
		var json = JSON.parse(res.content);
                //do something with the content here
	}
};