refactor: localStorage -> sessionStorage

src/PrivateRoute.js

@@ -6,7 +6,7 @@ export const PrivateRoute = ({ component: Component, ...rest }) => {
     <Route
       {...rest}
       render={props => (
-        localStorage.getItem('user')
+        sessionStorage.getItem('user')
           ? <Component {...props} /> 
           : <Redirect to={{ pathname: '/login', state: { from: props.location }}} />
       )}

src/_helpers/auth-header.js

@@ -1,5 +1,5 @@
 export function authHeader() {
-  let user = JSON.parse(localStorage.getItem('user'));
+  let user = JSON.parse(sessionStorage.getItem('user'));
 
   if (user.data.token) {
     return `Bearer ${user.data.token}` ;

src/_reducers/user.reducer.js

@@ -1,6 +1,6 @@
 import { userConstants } from '../_constants/user.constants';
 
-let userLocalStorage = JSON.parse(localStorage.getItem('user'));
+let userLocalStorage = JSON.parse(sessionStorage.getItem('user'));
 
 const initialState = userLocalStorage ? {loggedIn: true} : {loggedIn: false};