add last login column to users table

application/config/migration.php

@@ -22,7 +22,7 @@ $config['migration_enabled'] = TRUE;
 |
 */
 
-$config['migration_version'] = 166;
+$config['migration_version'] = 167;
 
 /*
 |--------------------------------------------------------------------------

application/migrations/167_add_last_login.php

@@ -0,0 +1,22 @@
+<?php
+
+defined('BASEPATH') or exit('No direct script access allowed');
+
+class Migration_add_last_login extends CI_Migration
+{
+
+  public function up()
+  {
+    if (!$this->db->field_exists('last_login_date', 'users')) {
+      $fields = array(
+        'last_login_date TIMESTAMP NULL DEFAULT NULL AFTER `reset_password_date`',
+      );
+      $this->dbforge->add_column('users', $fields);
+    }
+  }
+
+  public function down()
+  {
+    $this->dbforge->drop_column('users', 'last_login_date');
+  }
+}