fix(passwordless): Reduce db calls, run in parallel

Adds validations, reduces the number of database calls, separates
concers. reduces logic

server/boot/extend-request.js

@@ -0,0 +1,21 @@
+import _ from 'lodash';
+import http from 'http';
+import { Observable } from 'rx';
+import { login } from 'passport/lib/http/request';
+
+// make login polymorphic
+// if supplied callback it works as normal
+// if called without callback it returns an observable
+// login(user, options?, cb?) => Void|Observable
+function login$(...args) {
+  if (_.isFunction(_.last(args))) {
+    return login.apply(this, args);
+  }
+  return Observable.fromNodeCallback(login).apply(this, args);
+}
+
+module.exports = function extendRequest() {
+  // see: jaredhanson/passport/blob/master/lib/framework/connect.js#L33
+  http.IncomingMessage.prototype.login = login$;
+  http.IncomingMessage.prototype.logIn = login$;
+};