Added users page

Initial work on role separation

cp/app/Controllers/UsersController.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace App\Controllers;
+
+use App\Models\User;
+use Psr\Http\Message\ResponseInterface as Response;
+use Psr\Http\Message\ServerRequestInterface as Request;
+use Psr\Container\ContainerInterface;
+
+class UsersController extends Controller
+{
+    public function view(Request $request, Response $response)
+    {
+        $userModel = new User($this->container->get('db'));
+        $users = $userModel->getAllUsers();
+        return view($response,'admin/users/index.twig', compact('users'));
+    }
+}