diff -r 34a75bd8d0b9 -r d48946d164c6 client/src/reducers/authReducer.js
--- a/client/src/reducers/authReducer.js	Tue Jul 25 19:11:26 2017 +0200
+++ b/client/src/reducers/authReducer.js	Fri Jul 28 19:40:35 2017 +0200
@@ -2,6 +2,7 @@
 import * as types from '../constants/actionTypes';
 import UserRecord from '../store/userRecord';
 import asyncRequest from '../constants/asyncRequest';
+import uuidV4 from 'uuid/v4';
 
 export const isAuthenticated = (state = false, action) => {
   switch (action.type) {
@@ -44,6 +45,19 @@
   }
 }
 
+export const clientId = (state = null, action) => {
+  switch (action.type) {
+    case types.AUTH_DEAUTHENTICATE:
+    case types.AUTH_LOGOUT:
+      return null;
+    case types.AUTH_LOGIN_SUCCESS:
+      return uuidV4();
+    default:
+      return state;
+  }
+
+}
+
 export const login = (state = asyncRequest, action) => {
   switch (action.type) {
     case types.AUTH_LOGIN_REQUEST: